This stuff Will help kill off floating "green pea soup" algae but it cant entirely get rid of it on it's own. But you need it. And as long as you dose correctly you shouldn't have any problems! I was skeptical at first but my fish keep growing and have all been fine. I only dose with this stuff at night when the temps are cooler.
I love this product. I have 5 adult koi and 3 small goldfish. My oldest koi is Bubba at 27 years old.I find the Algae Repellent Agent to be consistently keep algae under control.Well worth the price. Use at directed for a clean pond. Safe for the fish and plants. I have a cat tail plant, water lilies and water hyacinth. I also have cats that drink from the pond on a daily basis and have done so for years with no ill effects. Highly recommend.
Works well. Had a ton of string algae in my 200G pond and I did what the directions said. I probably did slightly less just in case. Did it every 3rd day, while also scrubbing my pond frequently, and I’m happy to say that it is staying away. Will definitely be using this weekly or bi weekly for a preventative.