NT-MAX Koi and Garden Pond Clarifier + Sludge & Muck Digester, 2 lb
NT-MAX Koi and Garden Pond Clarifier + Sludge & Muck Digester, 2 lb
$4980
Rapidly restore clearer, healthier water in koi ponds, decorative garden ponds, and small residential water features with NT-MAX, a premium biological clarifier and sludge digester formulated to break down fish waste, uneaten food, leaves, and bottom organics that cloud water and fuel algae.
- Fast-Acting: Begins working immediately on suspended organics and sludge for noticeable clarity improvement within days when conditions are favorable.
- Sludge Digestion: Helps reduce bottom buildup (muck and organic sludge) by biologically digesting the material that accumulates in koi and garden ponds.
- Nutrient Support: Helps reduce excess nutrients that feed algae blooms, surface scum, duckweed, and watermeal while supporting healthier water conditions for koi and ornamental fish.
- Odor Control: Reduces foul pond odors caused by decaying leaves, uneaten food, fish waste, and other organic buildup, especially in warm weather.
- Fish-Safe & Chemical-Free: Non-toxic, non-pathogenic, and chemical-free when used as directed, safe for koi, ornamental fish, aquatic plants, pets, and wildlife.
- Cost-Smart Maintenance: Helps reduce the need for frequent drain-and-clean cycles, heavy vacuuming, and constant manual sludge removal by supporting ongoing biological digestion.
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Product Description
NT-MAX Biological Clarifier & Sludge Digester for Koi and Garden Ponds
NT-MAX is a premium biological clarifier and sludge digester designed specifically for koi ponds, decorative garden ponds, and small residential water features. It uses concentrated beneficial bacteria and enzymes to help break down organic bottom solids, reduce nutrient buildup that fuels algae and surface growth, and support clearer water without harsh chemicals.
When used as directed and maintained on a regular schedule, NT-MAX helps keep koi ponds cleaner, easier to manage, and more enjoyable by continuously digesting the organic waste that clouds water and stresses filtration systems.
How NT-MAX Works: Advanced Biological Digestion
Unlike chemical algaecides, NT-MAX works biologically. Once applied, beneficial bacterial spore colonies multiply and begin digesting organic material that accumulates in koi and ornamental ponds, including fish waste, uneaten food, leaf litter, and sludge on the bottom. As organics break down, nutrient pressure is reduced and water clarity is easier to maintain over time.
-
High-Density Microbial Formula: Concentrated facultative bacteria and enzymes designed to multiply quickly and digest organic buildup that clouds pond water and overloads filters.
-
Full-Column Digestion: Facultative bacteria work throughout the pond, supporting digestion of surface organics while also targeting oxygen poor sludge zones near the bottom.
Practical Benefits for Koi & Decorative Ponds
-
Rapid Clarity Support: Many pond owners see noticeable improvement within 7 to 10 days when conditions are favorable, with continued sludge reduction building over several weeks with consistent dosing.
-
Helps Reduce Nutrient Pressure: Supports lower nutrient load that feeds recurring algae blooms, duckweed, watermeal, surface scum, and odor, helping keep your koi pond clearer between cleanings.
-
No Harsh Chemicals: A non-toxic, non-pathogenic biological approach that supports pond clarity without chemical shocks when used as directed.
-
Less Messy Maintenance: Helps reduce frequent drain and scrub cycles and heavy sludge removal by continuously digesting organic waste over time.
Treatment Guide
To maximize clarity and sludge digestion in koi ponds, decorative garden ponds, and small residential water features, use the chart below to select the correct dosage per 1,000 gallons based on current conditions. For best results, review the complete shock treatment and application instructions beneath the chart before you apply.
NT-MAX works by introducing beneficial bacterial spore colonies that multiply and begin digesting organic material, nutrient buildup, and bottom sludge. With proper dosing and routine maintenance, koi and ornamental ponds can be
restored and kept clear.
Important:
Dilute NT-MAX with pond water only. Chlorinated tap or municipal water can inhibit the bacterial strains and reduce digestion performance. When possible, remove accessible leaves, twigs, and removable algae, duckweed, or other nuisance plants prior to treatment. Heavier dilution is recommended to ensure thorough coverage.
| Current Water Condition | |
|---|---|
| Little or No Buildup | |
|
Suggested Treatment: Apply 1 oz of NT-MAX per 1,000 gallons of pond capacity. |
Treatment Instructions: Dilute with pond water, swirl, and distribute evenly to treat the entire pond. Follow up monthly with 1 oz per 1,000 gallons, diluted and distributed the same way. |
| Mild to Moderate Buildup | |
|
Suggested Treatment: Apply 2 oz of NT-MAX per 1,000 gallons of pond capacity. |
Treatment Instructions: Begin with a Regular Shock treatment (below), then follow up with 1 to 2 oz per 1,000 gallons monthly as maintenance. |
| Moderate to Heavy Buildup | |
|
Suggested Treatment: Apply 4 oz of NT-MAX per 1,000 gallons of pond capacity. |
Treatment Instructions: Start with a Super Shock treatment (below), then follow up with 2 to 4 oz per 1,000 gallons monthly as maintenance. |
| Regular Shock and Super Shock Application Guidelines | |
|
Shock Treatments Explained: “Shocking” disperses a maximum concentrated amount of powerful bacterial enzymes throughout the entire system in order to quickly break down buildup at a much more aggressive rate than with a maintenance treatment. Regular Shock Protocol: Super Shock Protocol: Application Notes: Bio-Pack Note: |
|
Ideal Applications for NT-MAX
Highly effective in small residential aquatic environments including:
- Backyard Koi Ponds
- Decorative Garden Ponds
- Ornamental Water Gardens
- Residential Fish Ponds
- Small Estate & Courtyard Ponds
- Water Features & Accent Ponds
- Rock & Waterfall Pond Systems
- Patio & Landscape Pond Installations
- Residential Retention or Reflecting Ponds
- Private Hobbyist Aquatic Systems
Safe & Easy to Apply
NT-MAX is an eco-friendly pond clarifier and sludge digester designed for routine koi pond and water garden maintenance. Once distributed, beneficial bacteria begin multiplying and digesting organic waste over time. Safe for koi, ornamental fish, pets, birds, wildlife, and aquatic ecosystems when used as directed.
This product is manufactured and sold by NewTechBio. Information on this page is provided by NewTechBio and is intended to supplement the product label and SDS (where applicable); it does not replace them. Always read and follow the label and all safety instructions. Use only as directed; results may vary based on site conditions and application.
Last updated for listing accuracy: 04/30/2026
What is NewTechBio NT-MAX Koi and Garden Pond Clarifier and Digester, and is it a good fit for a backyard koi pond or decorative garden pond?
What is the NT-MAX dosing rate per 1,000 gallons for koi ponds, ornamental water gardens, and residential fish ponds?
Dose by pond volume per 1,000 gallons based on current conditions.
- Little or no buildup: 1 oz per 1,000 gallons, then 1 oz per 1,000 gallons monthly for maintenance.
- Mild to moderate buildup: 2 oz per 1,000 gallons, begin with Regular Shock, then 1 to 2 oz per 1,000 gallons monthly for maintenance.
- Moderate to heavy buildup: 4 oz per 1,000 gallons, begin with Super Shock, then 2 to 4 oz per 1,000 gallons monthly for maintenance.
Accurate measurement and consistent monthly dosing are key for reliable results.
How do I apply NT-MAX in rock and waterfall pond systems, patio and landscape pond installations, and other water features and accent ponds?
Can NT-MAX replace muck remover tablets, pond sludge remover pellets, or other small pond enzyme pond cleaners?
When should I use Regular Shock, and how do I do it for cloudy water and mild to moderate sludge buildup?
Use Regular Shock when you need a stronger step than routine maintenance, such as cloudy water, surface scum, or noticeable organic buildup.
- Week 1: Mix approximately 2 oz of NT-MAX with 5 gallons of pond water per 1,000 gallons of pond capacity. Distribute evenly.
- Week 2: Repeat Week 1.
- Week 3: Repeat Week 1.
Afterward, transition to monthly maintenance based on the condition chart, typically 1 to 2 oz per 1,000 gallons for ongoing control, and increase within the guide range if buildup remains persistent.
When should I use Super Shock, and how do I do it for heavy muck and strong pond odor in small estate and courtyard ponds?
Use Super Shock for moderate to heavy buildup, including heavy bottom sludge and strong odors driven by decaying organics.
- Week 1: Mix approximately 4 oz of NT-MAX with 5 gallons of pond water per 1,000 gallons of pond capacity. Distribute evenly.
- Week 2: Repeat Week 1.
- Week 3: Repeat Week 1.
Then maintain monthly at 2 to 4 oz per 1,000 gallons once conditions stabilize.
Do I keep my pump, filter, skimmer, aerator, waterfall, and UV clarifier running when adding pond bacteria to a koi pond?
Is NT-MAX safe for koi, goldfish, frogs, turtles, and aquatic plants in ornamental water gardens?
Will NT-MAX help with algae blooms, surface scum, duckweed, and watermeal without chemical algaecides?
NT-MAX is not a chemical algaecide. It supports clearer water by digesting organic waste and helping reduce nutrient pressure that contributes to recurring algae and floating plant overgrowth.
- Physically remove what you can first, especially removable algae, duckweed, or watermeal.
- Follow the dosing chart per 1,000 gallons based on current conditions.
- Maintain monthly after conditions improve.
What should I do before adding NT-MAX to get the best results in residential reflecting ponds and private hobbyist aquatic systems?
Do a quick prep pass before dosing.
- Remove accessible leaves and twigs.
- Remove removable algae, duckweed, or nuisance growth when possible.
- Dilute with pond water only, then distribute evenly across the pond surface and circulation zones.
- Use heavier dilution for better coverage, and re treat missed areas rather than under treating the full surface.
Consistent monthly maintenance after conditions improve delivers the best long term clarity and odor control.
Does NT-MAX come in water soluble packets, and how do I dose if I have powder?
- If you have powder, dose in ounces per 1,000 gallons and dilute with pond water before distribution.
- If you have water soluble Bio Packs, follow the equivalent ounce dosing guidance based on the pack weight and distribute for even coverage across the pond.
2 lb box vs 9 lb pail: which NT-MAX size should I buy for a backyard koi pond, and how many treatments will I get?
Choose size based on pond volume and treatment frequency.
- A 2 lb box contains 32 oz total.
- A 9 lb pail contains 144 oz total.
Estimated dosing coverage by rate:
- At 1 oz per 1,000 gallons for maintenance: a 2 lb box provides 32 one thousand gallon treatments, and a 9 lb pail provides 144 one thousand gallon treatments.
- At 2 oz per 1,000 gallons: divide those totals by two.
- At 4 oz per 1,000 gallons: divide those totals by four.
For a single small koi pond with routine maintenance, the 2 lb box is often sufficient. For larger koi ponds, multiple water features, or regular shock treatments plus monthly maintenance, the 9 lb pail typically offers better long term value and convenience.
Products related to this item
Product Details
SKU: NTB506
UPC: 811744010060
Category: Lake & Pond
Brand: NewTechBio
Weight: 2 lbs
Dimensions: 12 x 9.5 x 3 in
Important Information
SDS: View Safety Data Sheet (PDF)
LABEL (Directions & Rates): View Product Label (PDF)
Comments/Other: Tan flowable biodegradable packets
Certifications / Registrations: N/A
Origin: Locally Manufactured, Made in the USA
Feature: High Purity, Industrial Grade, No irrigation restriction, No swimming restriction, Non-hazardous, Safe for people, pets, and the environment when used as directed.
Product Form: Biodegradable packet
Product Details
NT-MAX Biological Clarifier & Sludge Digester for Koi and Garden Ponds
NT-MAX is a premium biological clarifier and sludge digester designed specifically for koi ponds, decorative garden ponds, and small residential water features. It uses concentrated beneficial bacteria and enzymes to help break down organic bottom solids, reduce nutrient buildup that fuels algae and surface growth, and support clearer water without harsh chemicals.
When used as directed and maintained on a regular schedule, NT-MAX helps keep koi ponds cleaner, easier to manage, and more enjoyable by continuously digesting the organic waste that clouds water and stresses filtration systems.
How NT-MAX Works: Advanced Biological Digestion
Unlike chemical algaecides, NT-MAX works biologically. Once applied, beneficial bacterial spore colonies multiply and begin digesting organic material that accumulates in koi and ornamental ponds, including fish waste, uneaten food, leaf litter, and sludge on the bottom. As organics break down, nutrient pressure is reduced and water clarity is easier to maintain over time.
-
High-Density Microbial Formula: Concentrated facultative bacteria and enzymes designed to multiply quickly and digest organic buildup that clouds pond water and overloads filters.
-
Full-Column Digestion: Facultative bacteria work throughout the pond, supporting digestion of surface organics while also targeting oxygen poor sludge zones near the bottom.
Practical Benefits for Koi & Decorative Ponds
-
Rapid Clarity Support: Many pond owners see noticeable improvement within 7 to 10 days when conditions are favorable, with continued sludge reduction building over several weeks with consistent dosing.
-
Helps Reduce Nutrient Pressure: Supports lower nutrient load that feeds recurring algae blooms, duckweed, watermeal, surface scum, and odor, helping keep your koi pond clearer between cleanings.
-
No Harsh Chemicals: A non-toxic, non-pathogenic biological approach that supports pond clarity without chemical shocks when used as directed.
-
Less Messy Maintenance: Helps reduce frequent drain and scrub cycles and heavy sludge removal by continuously digesting organic waste over time.
Treatment Guide
To maximize clarity and sludge digestion in koi ponds, decorative garden ponds, and small residential water features, use the chart below to select the correct dosage per 1,000 gallons based on current conditions. For best results, review the complete shock treatment and application instructions beneath the chart before you apply.
NT-MAX works by introducing beneficial bacterial spore colonies that multiply and begin digesting organic material, nutrient buildup, and bottom sludge. With proper dosing and routine maintenance, koi and ornamental ponds can be
restored and kept clear.
Important:
Dilute NT-MAX with pond water only. Chlorinated tap or municipal water can inhibit the bacterial strains and reduce digestion performance. When possible, remove accessible leaves, twigs, and removable algae, duckweed, or other nuisance plants prior to treatment. Heavier dilution is recommended to ensure thorough coverage.
| Current Water Condition | |
|---|---|
| Little or No Buildup | |
|
Suggested Treatment: Apply 1 oz of NT-MAX per 1,000 gallons of pond capacity. |
Treatment Instructions: Dilute with pond water, swirl, and distribute evenly to treat the entire pond. Follow up monthly with 1 oz per 1,000 gallons, diluted and distributed the same way. |
| Mild to Moderate Buildup | |
|
Suggested Treatment: Apply 2 oz of NT-MAX per 1,000 gallons of pond capacity. |
Treatment Instructions: Begin with a Regular Shock treatment (below), then follow up with 1 to 2 oz per 1,000 gallons monthly as maintenance. |
| Moderate to Heavy Buildup | |
|
Suggested Treatment: Apply 4 oz of NT-MAX per 1,000 gallons of pond capacity. |
Treatment Instructions: Start with a Super Shock treatment (below), then follow up with 2 to 4 oz per 1,000 gallons monthly as maintenance. |
| Regular Shock and Super Shock Application Guidelines | |
|
Shock Treatments Explained: “Shocking” disperses a maximum concentrated amount of powerful bacterial enzymes throughout the entire system in order to quickly break down buildup at a much more aggressive rate than with a maintenance treatment. Regular Shock Protocol: Super Shock Protocol: Application Notes: Bio-Pack Note: |
|
Ideal Applications for NT-MAX
Highly effective in small residential aquatic environments including:
- Backyard Koi Ponds
- Decorative Garden Ponds
- Ornamental Water Gardens
- Residential Fish Ponds
- Small Estate & Courtyard Ponds
- Water Features & Accent Ponds
- Rock & Waterfall Pond Systems
- Patio & Landscape Pond Installations
- Residential Retention or Reflecting Ponds
- Private Hobbyist Aquatic Systems
Safe & Easy to Apply
NT-MAX is an eco-friendly pond clarifier and sludge digester designed for routine koi pond and water garden maintenance. Once distributed, beneficial bacteria begin multiplying and digesting organic waste over time. Safe for koi, ornamental fish, pets, birds, wildlife, and aquatic ecosystems when used as directed.
SKU: NTB506
UPC: 811744010060
Category: Lake & Pond
Brand: NewTechBio
Weight: 2 lbs
Dimensions: 12 x 9.5 x 3 in
SDS: View Safety Data Sheet (PDF)
LABEL (Directions & Rates): View Product Label (PDF)
Comments/Other: Tan flowable biodegradable packets
Certifications / Registrations: N/A
Origin: Locally Manufactured, Made in the USA
Feature: High Purity, Industrial Grade, No irrigation restriction, No swimming restriction, Non-hazardous, Safe for people, pets, and the environment when used as directed.
Product Form: Biodegradable packet
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Reviews
Verified Purchase
Running a 60-site RV campground means guests judge the pond first. We trialed NT-MAX in early spring, documenting weekly: pH stable, odor rating dropped from 7 to 3, shoreline went from boot-sucking mud to firm sand. Kids fished on Memorial Day without sinking, and our Google reviews now mention “clean water.” Staff no longer spend Saturday mornings raking slime.
Verified Purchase
We used your treatment and wanted to thank you for producing an alternative to chemical products. We are retired and have a 2 Acre pond with turtles, ducks, fish and our 2 labs use it as a swimming pool year round. The treatment has definitely made a big difference and we like knowing that our pond is safe and clear at the same time.
Verified Purchase
Our family cabin sits on a finger of Lake Pontiac that turns soupy green each August. The kids hated the “chocolate pea soup” bottom. I scattered NT-MAX from a paddleboard once a week. By Labor Day the brown was clear to my toes and the dog quit tracking black sludge onto the dock. Two more pails are ready for this season.
Verified Purchase
Honestly surprised at how well NT-MAX cleared up our shoreline. Every spring we dreaded the slimy buildup, but this product really did the trick. Within three weeks, the shore was cleaner, and it’s now enjoyable just to sit and relax by the water.
Verified Purchase
Our townhouse community pond always got smelly after summer rains, causing residents to complain endlessly. Tried NT-MAX this past season, and within weeks residents noticed a big improvement. Emails thanking us instead of griping. I am happy with the product and it is a win.
Verified Purchase
I have been using your NT – Max Bio Packs for two seasons and I found it to be the best product I have tried for clearing up my two Koi ponds. Every time I I have been using your NT – Max Bio Packs for two seasons and I found it to be the best product I have tried for clearing up my two Koi ponds. Every time I have called, your representative provide excellent customer service and answer all my questions as well as delivering the products in a timely manner. Thanks for all your help and guidance. Yours Truly,
Verified Purchase
Used NT-MAX around our backyard pond to cut down on the slimy sediment. My kids hated going near the water because of the smell and gunk. Two weeks later, they're catching frogs and playing again. The odor is practically gone and the family is much happier. Thanks!
Verified Purchase
Purchased NT-MAX to manage sludge buildup along the shoreline of our RV campground pond. I wanted something environmentally safe since we have frequent campers and wildlife around the pond. It's been about 5 months since our first application, and there's noticeably less muck at the water's edge. Also like that it's safe and non-toxic. Will definitely be ordering more in the future.
Verified Purchase
Thank you for helping us solve our odor and decaying algae problems. Between the smell and the color, we were really at our wits end.
Verified Purchase
Localized smell around our HOA pond was awful every July. One bucket of NT-MAX, a few tosses from my kayak, and by August the air was normal again. Not scientific, just honest relief for the neighborhood.
Verified Purchase
I manage a corporate reflection pool under a glass skywalk. For months the water looked like weak coffee. Eight weeks on NT-MAX and the bottom stones reappeared; complaints vanished. Execs think we paid for a refurb, fine by me.
Verified Purchase
Our retention pond at the condo always had a stale smell. Decided to give NT-MAX a go, and within about three weeks we noticed a clear difference. It doesn't stink anymore. Good stuff!
Verified Purchase
Our pond always attracted mosquitoes and smelled stagnant by mid-summer. Sprinkled NT-MAX along the banks, and the floating mass problem noticeably lessened. Best part is the area feels fresh enough now that we’re comfortable sitting by the pond again.
Verified Purchase
Our homeowner’s association maintains a moderate-sized retention pond. For years, residents complained about odors, especially during the summer heat. A maintenance friend recommended NT-MAX, and after two months of use, everyone noticed a clear reduction in smell. The pond area feels fresher now, and residents are actually enjoying sitting near it again. Pretty satisfied with this product overall.
Verified Purchase
Our ranch drains into a wetland strip that used to clog with gunk. NT-MAX cut the sludge layer in half by mid-season and the herons are back stalking frogs. Good omen.
Verified Purchase
I help maintain several ponds at our city zoo. These ponds regularly accumulate organic buildup from ducks and geese. Decided to give NT-MAX a try because it's advertised as wildlife-friendly. Application was straightforward, and after a few treatments, the bottom sediments have visibly decreased. Staff commented that the area smells much better, too. Good product. Would recommend.
Verified Purchase
As you know, I manage 8 larger ponds in Hawaii and have had mixed results with chemical based treatments over the last 6 years or so. I did try a competing brand that faired well but the cost was way out of range with the homeowners which led me to your product. I have been using the chart for dose amount and the product works like a charm. I notice that if I hand sprinkle directly on the dead algae, it's gone in a matter of days. Thanks again for the help,
