4X Blue Pond Dye - Transforms Murky Water to Natural Blue - Super Concentrated Lake & Pond Dye - Liquid Shade Treats Up to 1 Acre - Safe for Fish & Wildlife (32 oz)

My husband ordered this after reading through many product descriptions, but failed to realize exactly HOW concentrated this dye actually is. It does what it says it will, -killing algae and coloring the water. He put in about a teaspoon, which will apparently treat a body of water about 15x's the size of ours. Even though it's quite dark right now, we're looking forward to seeing the level of blue after a winter of Washington rain. Great value for the money, you definitely don't need to use much!

This made a fast pleasant color change to our pond. It works as promised. I have a 2 acre pond and the one gallon was not enough to change water to deap blue. But in a slightly smaller lake the water should change very blue. My pound is no longer muddy and murky, it is a nice aqua-turquoise color. And water clairity is two feet deaper than before.

We put this in our 3 acre pond and it turned a really pretty blue. Use as it says and it's 1 bottle per acre. I bought 3.

I use dye in a large pond. This works as well as anything I have tried. The one gallon 4X goes a long way.

Nice color makes my pond super blue

You don't need much... wow

No photos because I can't see in the water when I used this. I bought this to help keep my tiny pond cooler for my fish, it turned the white spots blue on them (didn't seem to hurt them at all) turned my fingers blue and whole hand and arm when I reach in the pond to remove debris. Maybe I added too much so I added less after I cleaned the pond, nope still blue.

It's worked well in retarding algae growth in the couple of months it's been in our small pond.