Black DyeMond Pond Dye 4X Concentrate for Outdoor Ponds & Lakes, Natural Pond Color& Beauty Enhancer, Swimming Safe Water Colorant, Easy Liquid Application, 1 Quart

I have a 1500 gallon gold fish pond and a 7000 Koi pond that were looking a little sad and brown here in winter. And since the water clarity was good I was concerned about the views that might be open to heron, raccoons, possums. Yes I live in the city but have a nice woody acre. So I decided to try the Airmax Black Dye because the blue dye doesn't look good on waterfalls. Well the black is very pretty black with very little product used, but the water coming over the waterfalls looked neutral. That was good. The water in the test tubes for ammonia, nitrites, pH etc was clear so that tests were accurate. That is good. I hope that the lack of penetrating sunlight may slow down string algae as it warms up. But the darkness does not seem to affect water temp. Thats good. And the ponds looked really cool, deep black with the reflection the ads talked about. Until I decided to put some Natures Blue in one to try to get the Twightlight Blue that Airmax also makes but that I didn't buy. Unfortunately it did what ll blue dies did: make it a very pretty but unnatural blue across the waterfall and at the agitation at the bottom of the falls. When I received the products there was a slip enclosed that asked that if I could't give them 5 stars please call or email. I had 2 issues that were going to take my rating to 4 stars so I did as asked and emailed them my feedback. Much to my surprise I didn't get a defensive answer or an excuse as to why they must do what they must do. I got a real back and forth conversation that specifically addressed the feedback I was going to give about dosing for smaller ponds. As a result of the time and interest they took with someone who only spent about 50.00 with them, they have created a repeat customer. So my feedback is that the product is good but use increments of a half or one ounce at a time. If you have a waterfall the Natures Blue will make it look very blue...very bright blue, and I think unnatural. I am going to stick with Black or try Twilight Blue. Thanks Steve! You were a Blessing.

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.

Added to 1 gal of water and pump sprayed around pond. Pond is approximately 3/4 of an acre. Really pretty the next morning.

We've only had a pond for a year now and learned from the previous owner about this product. It wasn't until Jun 2025 that I put in our first application. I added one more 4 mo later; before the winter. So it's a little early to judge if it's doing everything it's supposed to, but it certainly did make the pond blue! Before and after pics attached.

Worked great. Did just what it said it would. The water is much more clear and there isn't nearly as much algae. I was late getting control of the algae because this is my first year with a pond. This stuff is great. Will buy again.

(In case you don't read the full review: My dad tried several other name brands of pond dye, but he still had algae blooms throughout the spring and summer. This product also contains beneficial bacteria to clear the water, and I had zero algae in my pond and zero affect to the fish. Getting a 2-in-1 product saved me $ and yielded better results than just dye.) I have a stocked 1/2-acre pond that's 40 years old. The summer of 2020 started hot early, resulting in a major algae bloom, with half the pond covered. I got a professional algae treatment, but further treatments would cost $300 a month. After doing a lot of research, I chose this product (Nature's Blue color) from reviews, and because it was budget friendly. I poured half of the gallon along the edges of the pond, and let it disperse naturally. The color wasn't as rich as I was hoping for, but I was eyeballing it, and likely didn't use enough product for the pond size, as the pond is 12 feet deep, and the instructions cite a 6-foot depth. I didn't have one spot of algae the entire 2020 summer, which turned out to be one of the hottest on record. So, success! I used the second half of the gallon about 8 weeks later (August) when I noticed the color disappearing. It's now late November 2020, and my pond still has a soft blue color. Most importantly, the pond was absolutely no work because this product gave me a 100% clean pond from spring right into winter. And no harm to the fish. UPDATE: This pond dye really sticks. I live in a cold winter state. When the pond froze over on occasion, it was a beautiful light blue against the white snow. Now here it is late April 2021. The pond expert told me that many of his clients already have half of their ponds covered with algae due to the early hot days this spring. My pond is still clear of any algae -- from last year's fall treatment. I had bought the Plus version with beneficial bacteria.

I bought this after fighting a losing battle against algae in my small pond. Crystal blue water seemed like a luxury, but this war was getting expensive so I figured "what the heck" Since it was just a small pond and not a lake I used only about a 1/8 cup. That was entirely too much! The water turn an opaque sapphire blue! Which would have been fine but I have a waterfall which now looked very artificial with all the blueberry colored water cascading. I figured my husband would never let me hear the end of it, but he liked the effect. Best of all, no more algae! That 1/8 cup did more good than about $500 worth of repeated algaecide and it's diminishing effects. I really like that this doesn't seem to stain. It does leave a powery blue residue at the pond edge as it evaporates, but it seems to wash away. The rocks of the waterfall have a bit of a turquoise tint, but it's not a bad look. Given how a little goes a long way, I would say I have a lifetime supply. Update: Its been about nine months and I am finally adding more. I can verify that this does not leave permanent stains on the rocks in my waterfall, even though they are very porous and get very soaked. Couldn't be happier.

Makes pond color so beautiful! Used in a 1.5 acre pond and made it color up well! Does not kill fish, keeps water clean and also keeps it tinted to help the underneath weeds from getting sunlight!