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)

Does a great job covering our 1/4 acre pond. I'm sure it's helping to keep the algae at bay during this extreme hot spell.I would purchase again.

This pond dye goes along way. One jug will do quite a bit. I used half of one on our small farm pond. It looked beautiful.

Nice color makes my pond super blue

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

You don't need much... wow

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!

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.

My pond is a very cloudy, chocolate milky color on a normal basis. I use one bottle of this in my .9 acre pond and a few hours later the whole thing is is a blue-ish green color. If the water was clearer I'm sure it would be more blue, but it's starting with a very, very cloudy pond. They say it helps with algae growth, too. It's difficult to measure that impact, but my pond does have a minimal amount of it.I re-use every 2-3 months to keep the color. It does fade over this time, but it's still visibly bluer than it would otherwise be.