Crystal BlueNatural Pond Cleaner - Muck and Sludge Remover, Safe for Koi - 1 Gallon

We've used this a number of times. Easy to use & does an excellent job of cleaning up algae!

Terrible packaging, cap will not even turnI am changing this review due to the company reaching out and offering a full refund

We had a lot of moss, didn’t actually think this would work because we’ve tried several other things first, but it worked! Got quite a few uses out of it, killed the moss without destroying the pond life within

This product DID NOT WORK!!!!! I need my money back please. Didn’t change my pond water at all

EXCELLENT PRODUCT

I think it is helping to clear the water but I don't see the muck getting better. I will stay with it to give it a fair chance. I say it is helping with clarity because I have a lot more weeds. I assume that's from increased sunlight

This was our first year with issues with the pond. Used this twice so far and are seeing great results. Probably need one more monthly round then we can go to every 2-3 months for maintenance.

At first, I saw some algae floating to top and was concerned.The first time it rained the dead floaters disappeared and the water became cleaner. I just second gallon after a good rain to get more bacteria closer to shore. I chose this first and do the lake dye cover up before summer weeds start growing on bottom. I have tried many types in over 20 years and this seems to work in half the time.