Rated 2.5 out of 5 by 2
Rated 1 out of 5 by DavidBed Waste of money
I have a 290 gallon pond. The bottle claims that it treats up to 700 gallons. 2 days ago I added half the of the bottle and it didn't have any effect. Yesterday I added the remainder of the bottle, and today the water is just a murky as before I started. This stuff is a complete waste of money.
Rated 4 out of 5 by Mollygal This product helps trememdously to make the water in the koi pond crystal clear.