AirmaxNature's Blue Pond Dye 4X Concentrate for Outdoor Ponds & Lakes, Natural Pond Colorant & Beauty Enhancer, Block Ultraviolet Rays, Fish, Bird & Livestock Safe, Easy Liquid Application, 1 Quart

Finally a product that is a great value and works great. The water quality is safe and the color is beautiful. Keeps algae,weeds under control. I have received several inquiries about what I am using in my pond.

We love this dye, and the fish love it too. When the dye is in, the fish can be seen clearly swimming high on sunny days, as the water is shaded nicely for them. It also keeps down the algae. We were paying $300 a month for a lake maintenance company to manage our spring fed 1 acre pond. Then we decided to diy it. This color is much prettier than the one the maintenance company used. We now also get our algeacide from Amazon...treat it with that every 2 weeks....just like the company did, then apply this once a month. A full bottle for our 1 acre. This system has saved us so much money! The algeacide we use is the $35 one. Great diy combo for crystal clear, pristine water. It turns out pond into a tropical paradise! It actually lasts longer than a month! As it starts to fade a bit, I retreat. I prefer mine very colored. You can go months before adding. When you get lots of rain, you will need it a bit sooner. It's safe for our fully stocked pond, and we even have foot long goldfish, and it's safe for them all.

Works great. Nice tint to water and cuts back on algae growth. A little goes goes a long way. Wear gloves so you won't be a Smurf😁

I used just a mere splash in my 3500 gallon koi pond and it went dark, very dark blue. So much so that I can no longer see the bottom and all of my beautiful koi fish appear blue, until they come up to feed. What I suggest is that you small pond owners use an eye dropper, add a few drops and wait a day or so and add a few drops more until you get the shade you desire. Straight from the bottle this stuff really stains so wear gloves and don’t spill it on anything.

Really please with the effect it had on my 1 acre pond. Great color and I can see the difference it’s made in the clarity. 3 weeks in and it’s holding a really nice blue green color.

Improves the water quality and look of the pond.

WORKS WONDERFUL, BEEN USING FOR YEARS!

Update 9/9; Unfortunately after 3 days it has seemed to of worn off and my pond turned green again. I’ve added another 2 fl oz to see if it hold up.So, I got this for my pond, and let me just say, this stuff does *not* mess around. My pond’s about 5,000 gallons +/- a few gallons here and there, baking in the unforgiving Southern California sun, and I figured, "Hey, I’ll eyeball the amount." Well, let’s just say my eyeballing skills are a little too ambitious. Less than 2 fl oz later, my pond is now a **bottomless abyss** of darkness.Pitch black. Like, I’m pretty sure if I toss a coin in, it’ll disappear into another dimension. It's not so much a pond anymore as it is a scene from a horror movie. I half-expect a mysterious fog to roll in and a voice to whisper, "Join usss..."In fairness, I “should” have started with 1 fl oz. But did I? Nope. So, here we are with a pond that could double as Darth Vader’s swimming pool.On the bright side (or lack thereof), it’s doing its job fantastically! No UV rays getting through this black void, that’s for sure. The water looks great, if you’re into the whole "infinite darkness" vibe. If you’re looking for a “subtle” tint, though, maybe start with less than half an ounce unless you’re trying to summon a kraken.**Overall, 10/10 would recommend**, but learn from my mistake and measure carefully unless you’re ready to embrace the darkness!