Let me start by saying - WOW. This pond dye delivers exactly what it promises. After pouring PondBliss into my 1/2 acre koi pond last spring, the transformation was magical. The water developed this gorgeous royal blue hue that made it look like a tropical paradise rather than my muddy backyard pond.

The best part? My koi fish didn't mind one bit! They actually seem more active now that the dye provides UV protection. I've noticed significantly less algae growth too - a welcome bonus after years of constant skimming.

Application couldn't be simpler. Just pour directly from the bottle (no mixing!) and watch the color spread within hours. One quart perfectly treated my pond about 5 feet deep, though larger ponds might need multiple bottles.

Now for some real talk - while the color lasts impressively long (I got about 5 months before needing reapplication), it does fade gradually. Some users report needing more product than estimated for complete coverage. And yes, all pond dyes are pricey, but PondBliss offers better value than most competitors I've tried.

Pro tip: The color appears darker in deeper water. My friend used it in her smaller ornamental pond and got an almost sapphire effect - stunning but different from my larger pond's appearance.

For anyone wanting to enhance their water feature's beauty while keeping fish safe, this product absolutely delivers. Just manage expectations about quantity needed and fading over time.