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

I haveca small backyard pond that was really murky and dark. I've tried a bunch of other products- more expensive ones and this one worked the best. It cleared it up w/i a day and has stayed clear for a week now w/o being retreated. I only used 1 cup and bought the gallon so it will last for a long time. Koi had no reaction to it and pond is crystal clear! Good stuff!

Great product. Helps reduce muck. And the appearance of the surface is much cleaner.

This did absolutely nothing for our lake - I wasted $ and will not buy again. At least I can say, I tried.

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

I buy this product every year to prevent excess weeds and muck in my pond. It works great.

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

The service was fast. The product did the job. Paddled around the perimeter of our pond and added two gallons of this product. In a weeks time most on the algae and other growth has been reduced to almost gone.

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