4X Blue Pond Dye and Cleaner, 2-in-1 Lake Colorant + Enzymes, 32oz | Not Rocket Sciences Muck Remover for Ponds, Makes Murky Water Clean, Clear, Cool & Beautiful, Ideal for Fish and Wildlife

I’ve used many bluing agents for ponds, and this blue is the best I’ve ever used. When they say it’s concentrated, they’re not kidding! The deep dark blue dye quickly permeates my 1/4 acre pond and colors the water a deep blue hue. This helps control algae growth, or better said, retards algae growth noticeably. I have a 12 foot waterfall and I add the concentrated dye near the water intake to the pump. Within a couple of minutes the blue tint speeds over the waterfall and spreads evenly over my pond. It is heavily concentrated, giving you a grerat value for your money. The concentrate functions well, so start slow because you can always more. You won’t believe how well this dye works on your pond or water project!

Very good color and it’s working great. I would recommend.

Great color and product works well. I would have given it a 5 but after I busted the seal the cap would not go on correctly and I spilled it everywhere (it was difficult to clean).

This stuff is AMAZING!!! Can not praise it enough. Third gallon purchased. Second season using. HIGHLY RECOMMEND!!!

Pond looks beautiful after this pruduct.