CrystalClear AlgaeOff - String Algae Remover - 10 pounds Treats Up to 4,000 Square Feet

Works as advertised and exactly what most reviews said it would do. This was an excellent choice for my 1000 gallon Koi pond with waterfall, that bakes in the sun and grows MAD hair algae.

I have a 2000 gal pond and have been using quite a bit of this stuff (2 cups every two days) and see no change. I'm about half way through the 10 lbs container. It also seems to increase the PH levels. Has anyone else noticed this?

My pond doesnt have fish, but i was hesitant to use strong chemicals to remove algae. This stuff works very good and removed 75% of my algae with one use. Ill recommend this product to some one , who wants to kill algae with out using harsh chemicals. I have tried various different products in the past, but not satisfied as much using this product

I’ve bought this product for several years and it has always worked well in cleaning alge from my ponds waterfall

This really does kill and prevent string algae in my Koi pond which is a bit too small for the fish load in it!

Was to take algae off of pond waterfall rocks, did a pretty good job, may need to do another treatment in a couple of days

This product worked as described. The algae in my pond came back relatively quick though. I can't blame it on the product entirely as there are different conditions for every pond. I felt the cost was pretty high for this, but needed to try it.

Did not work, even using a strong water/ powder mixture. Doesn’t mixed well with water, had to constantly shake while spraying to keep from clumping at bottom of sprayer. Would not buy if priced half off. Save your money and look into liquid algaecide