CrystalClear Algae D-Solv EPA Registered Pond Algaecide, 16 oz | Fast-Acting algae control for fountains & outdoor ponds containing koi & other fish, 16 oz treats 5,760 gallons.

This is the best product I've used in my pond for 30 years!! Fish and frogs are happy, algae is sad. The water is clear and algae was gone in 24 hours. Thank you for a great product!

This product works very well. I’ve been using it for several years and it knocks the algae out very quickly.

This is my review of Airmax’s Pond Algae Control Product Been using this product for a bit of time. It does the job of controlling the algae in my Koi’ ponds. Depending on the size of your pond, you can get this product in 16oz, 32oz, 1 gal, 2.5 gal, sizes. It is a liquid, so it is easy to add. One word of caution, read the instructions carefully, and only add the recommended amount. If you overuse it, it can damage your plants and hurt or kill your fish. Please be careful.

this product is extremely effective. very good value for the money. It took away my algae probably within 24 hours plus good for the fish health did not seem to harm them very easy to use. Just give it a good shake and my water is really clear.

This product definitely works. Our pond was a mess, I wasn’t sure of my water volume (850 gal) so I treated for 700 gallons to protect the fish. It’s taking longer to clear but saving fish was important. 4 treatments and it’s making a difference. Once we vacuum the bottom and have 1 or 2 more treatments it’ll be clear.

This improved our cattle stock tank clarity and decreased algae after first use. Reapplying today after 2weeks to continue to keep algae down

Two months ago, I would’ve come on here and given this product a five star review. It seemed to be the best product ever. I put it in my fountains, and the water was crystal clear. I have garden fountains, not a Koi pond, garden pond, or birdbath. I was happy because this product did not kill my landscape plants or the potted plants I have around my fountains. That was a real plus. For years, I have used chlorine bleach which is very effective, but it can be harmful to animals and it can also kill any plants around the fountain from the splatter of water. I saw this product and bought it and it worked wonderfully the first time. I ordered it a second time and got a bigger bottle. I guess it must be because of hot weather. The first bottle was in the spring time and now it’s the heat of summer. The algae is out of control in my fountains. I’ve had to scrub them and put bleach in them to get them clean, drain them, do everything I could to clean them up, and add this product and it just cannot keep the algae gone. After I struggled with it, I saw some online reviews and I did not realize it but this product is toxic to animals and humans. I should’ve paid closer attention. The label on the bottle says that; harmful to humans and pets. They say in the description that it will not harm Koi fish. I don’t have any fish but other people wrote reviews and said the product killed their fish. Then I saw someone mention that this product was toxic to animals. I have cats that sometimes drink out of my fountains, and I have seen birds and butterflies and bees drink from the fountain and I did not want anything that would make them sick or die. I do not recall anything in the online description saying that it was toxic to humans or animals other than just saying it was not harmful to fish. The label says it, but the description online did not, and so I returned the last unopened bottle that I had purchased because of its in ineffectiveness in hot weather and the toxicity to humans and Animals .

My pond is about 300,000 gallons and was full of blanket weeds so i took a risk and spend good money on 2 2.5 gallons cans. I used sprayer to spray it evenly on the water. Before that i manually removed 10 carts of weeds and spend at least 10 hours on that After 2 days i see that rest of the weeds got brown and after 5 days disappeared but water became very muggy and with oil film on surface. Probably max 2 foot visibility - that is why 4 stars because they told it will be crystal clear. May be it is from dead weeds on the bottom Only after couple of good rains it became more clear. Also i see that other kind of weeds are slowing down - will see in few weeks