Pondworx Pond Bacteria - Concentrated & Formulated for Large Ponds, Water Features - Safe for Koi - 32ounes & Treats up to a Quarter Acre Pond

Works great to clear the water but be very careful how much to add if you have goldfish they don’t like this stuff

Product works great and is essential to managing the health of my fishing pond in tandem with the aerator to circulate the later. It breaks down the waste from excess fish food and the resulting fish poop to help prevent algae and weed growth.

I have a small back yard pond, about 550-600 gallons. This is amazing. Within hours there was a remarkable improvement. Every day it’s getting clearer, and it was like pea soup. I’ll treat the pond again in the recommended 1 weeks time. This is something that I’ll never be without. It took a while in getting here, as it was delayed in shipment. So glad I was unable to cancel. When it finally arrived,I said, give it a shot. This is truly amazing. I recommend it highly

This stuff is amazing. I ordered it to use in my water butts. I had to configure how much was to be used for each of the butts. Treated one day and 24 hours later the rain water was usable and didn't smell anymore. The water had cleared so nice. Bonus it doesn't harm your fish if you happen to treat a pond. That's something I read while deciding to order. Brilliant stuff!!

I've used this product before and I do notice the difference very quickly, but in the middle of summer in South Carolina in the direct sun, it's just too much little bit of algae that's left just reproduce his way too fast