It worked. Not as dark and natural appearing as expected. Looked similar to putt putt course water, which isn't a bad thing if that's what you want.

have used this three times this year, first time mid feb 2025 , worked great, pond was brownish green and then turned blue and stayed that way for several months, used the 2nd time sometime around late may, worked well at first but didn't seem to last as long this time, used for the third time last week, late july 2025, could not tell that it had any effect at all. first couple of times you could clearly see the dark color spreading out and eventually after couple of days pond was nice color, this time the color went away overnight and pond color did not change. its 100 degrees outside. wondering if the hot water temp caused me to waste 50 bucks???????????????

Easy to apply, and did the tick to hide my ponds under growth for daughter graduation party.