Cutrine Ultra, 2.5 Gallons
Cutrine Ultra, 2.5 Gallons
$15588
Cutrine Ultra 2.5 Gallons gives buyers a stronger liquid option when ordinary pond and lake algae treatments are not enough. This copper-based liquid algaecide is built for tougher filamentous algae, colonial planktonic algae, Chara, and certain copper-sensitive aquatic plants, with visible reduction often starting in 1 to 2 days. The double-chelated formula helps keep copper available in the water, while the built-in penetrating surfactant makes the treatment more appealing when you want stronger activity without adding extra mixing steps.
- Fast visible action; algae reduction commonly starts in 1 to 2 days
- Tough-algae fit; strong choice for filamentous algae, Chara, and colonial blooms
- Longer water-column activity; chelation helps keep copper from dropping out quickly
- Flexible application; use by spray, injection, or flowing-water drip
- Immediate water-use flexibility; swimming, fishing, irrigation, and livestock use may continue
- Professional-strength design; surfactant-enhanced formula supports harder control jobs
Choose the 2.5-gallon size when you want serious liquid control with more planning flexibility.
Always follow label directions.
Recommended companion treatment program
NT-MAX Lake & Pond Clarifier + Sludge & Muck Digester Rapidly restore crystal clear conditions in lakes, ponds, and lagoons using NT-MAX, a high-performance biological clarifier powered by….
After using Cutrine Ultra, wait about 5 days before applying NT-MAX Lake & Pond Clarifier + Sludge & Muck Digester.
Bundle savings may be available below when eligible.
Frequently bought together
FREE Shipping
In Stock - Ships Today!
Need help finding an alternative that can ship to your location? Call 800-509-0927.
Frequently bought together
Need Help?
(800) 509-0927
Products related to this item
Product Description
Stronger liquid control for harder algae pressure
Cutrine Ultra is a strong fit when you need more than a basic liquid copper treatment. Its double-chelated copper formula and penetrating surfactant make it especially appealing for tougher filamentous algae, colonial planktonic algae, Chara, and certain copper-sensitive aquatic plants, while the liquid form keeps application flexible for ponds, lakes, shorelines, hatcheries, and even irrigation conveyance systems. For buyers planning a real treatment program, the rate structure also makes it easier to size orders by acre-foot instead of guessing.
Key Features & Benefits
| Feature | Benefit |
|---|---|
| 27.8% copper ethanolamine complex | Delivers professional liquid algae and plant control with 9% metallic copper equivalent. |
| Double-chelated formula | Helps keep copper available in the water instead of precipitating out quickly. |
| Penetrating surfactant included | Improves activity on harder algae without forcing an extra surfactant purchase. |
| Multiple application paths | Supports spray, injection, and flowing-water drip use depending on the site. |
| Immediate post-treatment water uses | Works well for multi-use waters where waiting periods create unnecessary hassle. |
Directions & Dosing Snapshot
| Use Case | Label Rate | Application Notes |
|---|---|---|
| Planktonic algae | 0.2 to 0.6 ppm copper = 0.6 to 1.8 gal/acre-ft | Select ppm by growth density and maintain at least 3 hours contact time. |
| Filamentous algae | 0.2 to 0.8 ppm copper = 0.6 to 2.4 gal/acre-ft | Break up floating mats before spraying for better contact and more even coverage. |
| Benthic algae such as Chara or Nitella | 0.4 to 1.0 ppm copper = 1.2 to 3.0 gal/acre-ft | Use the higher rate as density increases and coverage becomes harder. |
| Hydrilla or Egeria, early season low density | 0.4 to 0.5 ppm = 1.2 to 9.0 gal/surface acre depending on 1 to 6 ft depth | Choose the depth column that matches the actual treatment area. |
| Hydrilla or Egeria, mid-season moderate density | 0.6 to 0.8 ppm = 1.8 to 14.4 gal/surface acre depending on 1 to 6 ft depth | Rates increase with depth and plant pressure. |
| Hydrilla or Egeria, late season high density | 0.9 to 1.0 ppm = 2.7 to 18.0 gal/surface acre depending on 1 to 6 ft depth | Do not exceed 1.0 ppm copper concentration within treated water. |
| Flowing water drip application | 1 to 5 qts/hr for 1 to 5 CFS, or 16 to 79 ml/min | Maintains 1.0 ppm copper for 3 hours in treated water. |
Always follow the full label for complete directions, restrictions, and site-specific requirements.
Comparison Table
| Cutrine Ultra | Standard chelated copper liquid | Chelated copper granules | Biological pond-treatment program | |
|---|---|---|---|---|
| Primary role | Fast liquid control of tougher algae and some copper-sensitive plants | Liquid algae control | Bottom-zone or spot-focused algae placement | Long-term organic-load reduction |
| Application style | Spray, injection, or drip | Varies by label | Broadcast or spot granule placement | Program-based dosing |
| Best-fit problem | Harder filamentous algae, colonial planktonic algae, Chara | General liquid copper use | Bottom-growing algae and deeper spot work | Muck, sludge, and recurring nutrient pressure |
| Time to visible change | Often 1 to 2 days | Varies by label | Varies by label | Slower, maintenance-oriented |
| Why buyers choose it | Surfactant-enhanced liquid flexibility with strong multi-site fit | Simpler liquid copper option | Easier bottom targeting | Supports longer-term pond balance |
Why Choose a surfactant-enhanced liquid algaecide?
- Harder-problem performance: The penetrating surfactant makes this formula more appealing when ordinary liquid copper treatments are not enough.
- Better planning flexibility: The label supports still-water spray work, moving-water drip use, and depth-based aquatic plant rates.
- Stronger buyer confidence: Immediate post-treatment water-use flexibility helps this fit active multi-use ponds and lakes more naturally.
Long-Term Pond Health Strategy
Cutrine Ultra is excellent for fast knockdown, but killing algae or aquatic growth is not the same as removing the sludge, muck, and excess organics that help feed repeat problems. As treated biomass dies and settles, it can add to the organic load over time, so a beneficial microbe program is the prudent long-term complement when you want cleaner bottom conditions, less nutrient fuel, and a more balanced pond strategy.
This product is distributed by NewTechBio as an authorized reseller. Specifications, treatment rates, and performance claims are sourced from the official EPA-approved manufacturer label and published documentation. NewTechBio does not independently verify manufacturer claims. Always read and follow the label.
Last updated for listing accuracy: 04/26/2026
What is Cutrine Ultra 2.5 Gallons best used for?
Is Cutrine Ultra a strong choice for filamentous algae, planktonic algae, and Chara?
When should I choose Cutrine Ultra over a granular algae treatment?
How much Cutrine Ultra do I need?
Why can algae come back after treatment, and should I add beneficial microbes too?
How fast does Cutrine Ultra work?
Do I need to add a separate surfactant?
Can I still use the water after treatment?
Is Cutrine Ultra okay for koi ponds or trout waters?
Can Cutrine Ultra be used in moving water or irrigation canals?
Products related to this item
Product Details
Important Information
SDS: View Safety Data Sheet (PDF)
LABEL (Directions & Rates): View Product Label (PDF)
Comments/Other: Review the Product Label and SDS for directions, rates, and safety information.
Certifications / Registrations: EPA registered
Origin: Made in the USA
Feature: Liquid concentrate formulation
Product Form: Liquid
Product Details
Stronger liquid control for harder algae pressure
Cutrine Ultra is a strong fit when you need more than a basic liquid copper treatment. Its double-chelated copper formula and penetrating surfactant make it especially appealing for tougher filamentous algae, colonial planktonic algae, Chara, and certain copper-sensitive aquatic plants, while the liquid form keeps application flexible for ponds, lakes, shorelines, hatcheries, and even irrigation conveyance systems. For buyers planning a real treatment program, the rate structure also makes it easier to size orders by acre-foot instead of guessing.
Key Features & Benefits
| Feature | Benefit |
|---|---|
| 27.8% copper ethanolamine complex | Delivers professional liquid algae and plant control with 9% metallic copper equivalent. |
| Double-chelated formula | Helps keep copper available in the water instead of precipitating out quickly. |
| Penetrating surfactant included | Improves activity on harder algae without forcing an extra surfactant purchase. |
| Multiple application paths | Supports spray, injection, and flowing-water drip use depending on the site. |
| Immediate post-treatment water uses | Works well for multi-use waters where waiting periods create unnecessary hassle. |
Directions & Dosing Snapshot
| Use Case | Label Rate | Application Notes |
|---|---|---|
| Planktonic algae | 0.2 to 0.6 ppm copper = 0.6 to 1.8 gal/acre-ft | Select ppm by growth density and maintain at least 3 hours contact time. |
| Filamentous algae | 0.2 to 0.8 ppm copper = 0.6 to 2.4 gal/acre-ft | Break up floating mats before spraying for better contact and more even coverage. |
| Benthic algae such as Chara or Nitella | 0.4 to 1.0 ppm copper = 1.2 to 3.0 gal/acre-ft | Use the higher rate as density increases and coverage becomes harder. |
| Hydrilla or Egeria, early season low density | 0.4 to 0.5 ppm = 1.2 to 9.0 gal/surface acre depending on 1 to 6 ft depth | Choose the depth column that matches the actual treatment area. |
| Hydrilla or Egeria, mid-season moderate density | 0.6 to 0.8 ppm = 1.8 to 14.4 gal/surface acre depending on 1 to 6 ft depth | Rates increase with depth and plant pressure. |
| Hydrilla or Egeria, late season high density | 0.9 to 1.0 ppm = 2.7 to 18.0 gal/surface acre depending on 1 to 6 ft depth | Do not exceed 1.0 ppm copper concentration within treated water. |
| Flowing water drip application | 1 to 5 qts/hr for 1 to 5 CFS, or 16 to 79 ml/min | Maintains 1.0 ppm copper for 3 hours in treated water. |
Always follow the full label for complete directions, restrictions, and site-specific requirements.
Comparison Table
| Cutrine Ultra | Standard chelated copper liquid | Chelated copper granules | Biological pond-treatment program | |
|---|---|---|---|---|
| Primary role | Fast liquid control of tougher algae and some copper-sensitive plants | Liquid algae control | Bottom-zone or spot-focused algae placement | Long-term organic-load reduction |
| Application style | Spray, injection, or drip | Varies by label | Broadcast or spot granule placement | Program-based dosing |
| Best-fit problem | Harder filamentous algae, colonial planktonic algae, Chara | General liquid copper use | Bottom-growing algae and deeper spot work | Muck, sludge, and recurring nutrient pressure |
| Time to visible change | Often 1 to 2 days | Varies by label | Varies by label | Slower, maintenance-oriented |
| Why buyers choose it | Surfactant-enhanced liquid flexibility with strong multi-site fit | Simpler liquid copper option | Easier bottom targeting | Supports longer-term pond balance |
Why Choose a surfactant-enhanced liquid algaecide?
- Harder-problem performance: The penetrating surfactant makes this formula more appealing when ordinary liquid copper treatments are not enough.
- Better planning flexibility: The label supports still-water spray work, moving-water drip use, and depth-based aquatic plant rates.
- Stronger buyer confidence: Immediate post-treatment water-use flexibility helps this fit active multi-use ponds and lakes more naturally.
Long-Term Pond Health Strategy
Cutrine Ultra is excellent for fast knockdown, but killing algae or aquatic growth is not the same as removing the sludge, muck, and excess organics that help feed repeat problems. As treated biomass dies and settles, it can add to the organic load over time, so a beneficial microbe program is the prudent long-term complement when you want cleaner bottom conditions, less nutrient fuel, and a more balanced pond strategy.
SDS: View Safety Data Sheet (PDF)
LABEL (Directions & Rates): View Product Label (PDF)
Comments/Other: Review the Product Label and SDS for directions, rates, and safety information.
Certifications / Registrations: EPA registered
Origin: Made in the USA
Feature: Liquid concentrate formulation
Product Form: Liquid
Popular Items
Reviews
Verified Purchase
We use this around our farm ponds. I little goes a long ways.
Verified Purchase
I like the built in surfactant that is designed for this product. No need to measure how much surfactant needed. Just mix with water and I'm off. Works really good.
Verified Purchase
Works great and lasts.
Verified Purchase
I work for the public works department. This is a staple product we always keep on hand. Never fails and quickly kills off slime and green algae.
Verified Purchase
We manage over 90 smaller lakes in IL area and the Cutrine Ultra goes down easy and tank mixes with whatever we throw at it. We pair is Diquat to make early stubborn Chara vanish! Excellent stuff.
Verified Purchase
Most of the copper in my area is a 5% effective. The ultra is 9% and the same price as our stores carry, but way stronger. Best deal and turns the algae brown in 3 days.
Verified Purchase
Not super cheap but works well
