Cutrine-Plus Liquid Algaecide - 1 Gallon Professional-Grade Algae Killer for Lakes & Ponds, EPA Approved to Control All Types of Algae (Planktonic, Filamentous, and Chara)

This cutrine plus is easy to use and effective. I've been using it for 20 years and it's still the same. I mix the recommended ratio of 1 gallon to 9 gallons of water. I spray this solution directly on to the algae. The algae is dead the next day and doesn't come back. More algae will appear eventually and you'll need to reapply. I spray moderately. You don't need a lot on the algae to accomplish your mission.

Filled my pool from the well this month. The water was brown. Couldn't even see the 2nd step of the pool. The 2nd day the brown became a green. Put two cups of Cutrine Plus in the deep end. Two days later it went back to brown. It took 5 days of cleaning the filter 2x a day but the pool was crystal clear day 6. No algae in the (new) filter. As ppl who do their own pools know algae in the filter drastically reduces the filter's efficiency reducing the time between necessary cleanings. Algae in the filter was my biggest concern.I let the pool go for another week with high chlorine and algaecide levels to clean the tannin stains and scum lines accumulated during the winter when it was drained. The levels of chlorine and algaecide reduced over time and filter cleanings. I declared it ready and the Ex came over and collected a bottle of pool water to have it tested. It tested 'perfect' at the local pool supply store and she was complimented on how clean the water was.IMO this is good stuff for spring pool startup. Since it's not specified for swimming pools I'm sticking with In the Swim's pool algaecide during swimming season. They're both copper-based but....

Good for algae in stock tanks. Effective and versatile for both floating and submerged algae. Takes some trial and error to get the proper mixture for your individual needs. Mixing instructions are overly complex and somewhat difficult to interpret. I felt as if the instructions and mixing guides were written to protect the manufacturer from liability rather than to actually help the consumer. I use Cutrine alone or in combination with diquat depending on the problem which has arisen. Once you get your mixture right Cutrine is an effective, economical treatment. Does not kill Duckweed or Azolla.

I've ordered this on a subscription for two years, and in the last 6 months, Amazon will no longer ship to any addresses I have setup.

Worked well on the moss and algae in my pond. I have only treated half my pond so far (per the directions). Will treat again in 14 days so hopefully that will take care of the rest of the moss and algae

It worked

Applied a small sample according to mixing instructions and sprayed along the edges of our 1/4 acre fish pond nearly covered with filamentous algae. It killed the algae as advertised. Turned it brown. The problem was in the succeeding 3 or 4 days the new growth mixing with it practically obscured the progress made. A week or so later you practically couldn't distinguish the difference. Don't believe any amount of it would have solved the problem. Returned the remaining portion. So the problem wasn't with the product. Just the impossibility of its controlling the new growth. Think aeration is the only cure. Not chemicals. Any suggestions?

Why pay more? Same chemical for Algae control in swimming pool chemicals.