PondPerfect All Purpose Formula, 32 oz. (946 ml)

My parents use this in their koi fish pond yearly to maintain it. It’s been working great as a yearly treatment for the last 8-10 years. Does a great job of clearing up cloudy water.

First, let me say I'm not a marine biologist, chemical engineer, own stock or an employee of PondPerfect. Hell, I didn't even take high school chemistry. But, I have had a few ponds and I've owned a couple of saltwater tanks so I did get an on the job crash training on man made artificial environments. I usually don't write reviews but I read a lot of them before I purchase so I felt I should start helping others if I can.I read several reviews where there was catastrophic results in using this product and one who said, " the product was cloudy". The cloudiness is due to being live enzymes in the product and that's how it works. I always shake mine to get a good suspension before measuring for usage. Seems to work well for me.I've been using this product for several months now to help control hair algae, green/ dark cloudiness of water, and the nasty swamp odor. The product works very well. No, the hair algae is not eradicated but it is much more manageable. The clarity of the water is wonderful! I can see all the way to the bottom of the 4' depth. There is no longer any swampy odor at all. I do use this product every week for my 7,000 gal pond.Now, my very limited experience with atrifical water environments, through word of mouth, reading documents and tri and error, has taught me that any changes must be gradual. As I'm sure your aware, when you introduce new fish to your aquatic home, it should be done gradually. Well, when you change your established enviornment with marine l life that has been living there for some time, it needs to be done gradually. Any drastic, instant change is going to shock the whole living environment and kill most things. Maybe it's my location, filtration, water turn over rate, size of pond, my daily fussing with the system, the type and amount of fish and plants I have, the alignment of the stars or something I did right in a previous life but the produce works very well for me.Get advise from local specialist in your area if you have one. Take a water sample to get it tested. Read several articles, not just one, from experts that work or practice, (notice that is just like the human medical field, "practice", because no one still knows what's going on with God's creation), in your area or similar climate before you jump in and make drastic changes.I hope this was helpful to someone.

I have a small pond. It keeps the algae from taking over .

This product is AMAZING. Our ~35,000 gallon pond was a green, algae-clogged mess and we were scooping so much scum out every day that we could barely keep up.After four weeks of PondPerfect treatment (one bottle per week), the algae was on the run, and now, a couple of months later, our pond is gorgeous, crystal clear, and a beautiful habitat for our aquatic denizens to live and breed. The wild critters finally have a nice, clean source of drinking water!Highly recommend this product, and will keep using it as long as we have that pond!

I've been using this product for my back yard koi pond. This beneficial bacteria helps keep the water clear. For the price, it can't be beat!

I have used this for a month as directed and my pond water is just as green as it was before I used this product. Was a waste of money.

It makes the crap in the pond stick together in larger clumps of gunk. Exactly what we needed and hoped for

Received bottle punctured leaked all over the bottle and the packaging. Only little less then half bottle remains.