65 reviews for Algae Repellent Agent

1. Aiden HibbertVerified Purchase

   Rated 5 out of 5

   This stuff works great and is the ONLY product (and I've tried many) that has totally and completely solved my string algae problems. Whenever a bloom...More

   This stuff works great and is the ONLY product (and I've tried many) that has totally and completely solved my string algae problems. Whenever a bloom is evident, I add a cup full to the head of my waterfall and the benefits are visible within 24 - 36 hours as the algae will turn from bright green to brown. After waiting approximately three to four days, I will add another cup full targeting specific areas where the product didn't reach the first time and, again, within 24 - 36 hours the remaining string algae is dead and disintegrating from the rocks and that which was dying initially has completely disappeared.
   Aryaan RidleyVerified Purchase

   Rated 5 out of 5

   Based on other reviews, I decided to be conservative with treatment. I set my filter on a box so that it was close to the surface and vigorously shoot...More

   Based on other reviews, I decided to be conservative with treatment. I set my filter on a box so that it was close to the surface and vigorously shooting water out of the pond, to increase aeration. I under-treated based on careful measurements of the pond. It didn't totally clear it, but it significantly knocked down the awful hair algae. I treated again after three days and got more results. I'm using it about once a week now and there is still a bit of algae on the sides, but it looks natural. Also, my plants were getting strangled and now they have lots of new growth. I didn't lose any of my fish. So just be careful!
   Derren FrostVerified Purchase

   Rated 5 out of 5

   I've tried just about every algaecide product out there. Florida sun is tough on ponds and mine has a duck who mucks it up enjoying her life. The pond...More

   I've tried just about every algaecide product out there. Florida sun is tough on ponds and mine has a duck who mucks it up enjoying her life. The pond was shameful but it wasn't for lack of spending a small fortune on products that didn't help... until I found this product. I can see my goldfish again. I can see the bottom at two feet (not at four feet). A blanket of furry, mossy algae covering the sides died to reveal the liner beneath. It took two bottles for my pond and I'm reordering to have this on hand for another treatment after summer. It really require vigorous aeration to help the fish breathe as the algae dies off.
   Jaya MillerVerified Purchase

   Rated 5 out of 5

   Great product! I've procrastinated too long in buying an algaecide, for two reasons: One, we have a huge frog living in our pond, who is here year aft...More

   Great product! I've procrastinated too long in buying an algaecide, for two reasons: One, we have a huge frog living in our pond, who is here year after year; and two, our pond was built by the previous home owner, & no one knows how many gallons it is. So I hesitated in using something incorrectly and killing our frog. Most of reviews were really good on this product, that is advertised as safe for wildlife. So I took a chance. I may be under-dosing just a tad, to be on the safe side, but my pond is clear now, and my frog is fine!!! Plus we have squirrels, lizards, & who knows what else drinking out of it, & I haven't found anyone who has died. I'll always use this now.
   Jadon LloydVerified Purchase

   Rated 5 out of 5

   Really effective. Went of vacation and returned home to see my pond infested with string algae, it was everywhere, in the falls, on every rock, and ev...More

   Really effective. Went of vacation and returned home to see my pond infested with string algae, it was everywhere, in the falls, on every rock, and even in the skimmer. I used this product in accordance with the instructions and it began working almost immediately. Everyday after I applied it, the pond had less and less algae. After a week the algae was no longer visible, it was completely gone. In order to protect my fish I followed the dosage precisely and I added an additional aerator to the pond during treatment to make sure they had enough oxygen. This product is super effective, works great and did not harm my fish. I am very happy with this product and will use it again if need be.
   Kiran SinclairVerified Purchase

   Rated 5 out of 5

   Do not use any algae products unless you have alot of aeration. Your fish will die! I have a very large septic aeration pump going to a very large dif...More

   Do not use any algae products unless you have alot of aeration. Your fish will die! I have a very large septic aeration pump going to a very large diffuser on a bottom drain and I lost 1 fish. However I did use alot more than directions. I have been vacuuming what looks like dish soap bubbles off of the top of the water for 3 weeks after most of algae was dead. I tried another brand first and it did nothing at all. This starts to work immediately but I had a really bad really tough algae problem. It works but not as fast as I wanted so I waited the 3 days before retreating the first time then overdosed the 2nd and lagae gone. Can't wait for soap bubbles to be gone also (from oversosing I'm sure)
   Malaika LeeVerified Purchase

   Rated 5 out of 5

   This product has been very effective for keeping our pond water clear and fish healthy. Fish are not adversely affected, except when we put way too mu...More

   This product has been very effective for keeping our pond water clear and fish healthy. Fish are not adversely affected, except when we put way too much into the water at one time. (Didn't read the directions! tsk tsk!) All fish survived in spite of our over-eagerness to get rid of the overgrown algae. Definitely got rid of green water and the string algae in about two weeks of applications. A small amount of algae remains on the rocks, like a fuzzy face, but it is appropriate, providing food for the gold-fish and shubunkins. And the water is crystal clear. A visitor asked me, "How do you keep your pond so CLEAN?" Victory! Been using this for a month now, and the pond water looks fantastic, fish are happy, and so are we!
   Lily HarrisonVerified Purchase

   Rated 5 out of 5

   I had a few koi added to my pond/waterfall this spring. Lazy me let the algae run wild. It got to the point you couldn't see the water basically, and ...More

   I had a few koi added to my pond/waterfall this spring. Lazy me let the algae run wild. It got to the point you couldn't see the water basically, and I had ducks bobbing for the fish. I got this out of desperation, because the fish hadn't been eating (I don't blame them) and the pond was beyond hope. So I ordered this stuff, and used it every 3 days like it said. I was sure it was going to kill the fish. I hesitate to use superlatives because to me that's the sign of a fake review, but this stuff was fantastic. Within a week the pond was clear, and the fish were healthy and finally eating. I was simply amazed. Note: You will have to clean out the filter every day while this algae control does it's thing because so much junk will get into the filter and pump if you don't. But this product is one of the few that greatly exceeded my expectations. Highly recommended.
   Virgil CarsonVerified Purchase

   Rated 5 out of 5

   I have been using Algaefix for several years and have found it to be the absolute best for cleaning up filter clogging floating algae. My pond holds a...More

   I have been using Algaefix for several years and have found it to be the absolute best for cleaning up filter clogging floating algae. My pond holds about 1,500 gal and 20+ fish. At the start of warmer weather, I treat the pond with Algaefix about three times and have crystal clear water all summer, only needing a touch up treatment on occasion. I recommend that treatment be stopped around September to allow regrowth for fish grazing over the winter months. Using one of those hose fertilizer sprayers makes application very easy. You might also consider getting some barley straw in the water to stop green water as it aids the Algaefix. I don't know how they do it, but Amazon sells this product at about half the price of pond outlet shops and ships it fast. I highly recommend this product for algae control in outdoor fish ponds. Just be certain to follow the directions and keep aeriation going.
   Keisha BrewerVerified Purchase

   Rated 5 out of 5

   I have two 57 watt UV lights on my 8000 gallon pond but occasionally for some unknown reason the water starts to turn a little green. I put one cup of...More

   I have two 57 watt UV lights on my 8000 gallon pond but occasionally for some unknown reason the water starts to turn a little green. I put one cup of this in the pond and the very next day it is sparking clear. I have tons of aeration with two waterfalls and a bottom aerator so no signs of stress at all on fish when using this. I used the recommended dosage once when my UV lights quit working when i was away. The pond was very green when i got back. I fixed the uv lights and with allgaefix it was clear the next day. Amazing! I do recommend for occasional maintenance in addition to UV lights here in the hot Florida sun. I also have a shade cloth canopy to filter out some sun. I would not solely rely on chemicals like this to keep your pond clear. Make sure you have a ton of bio balls and try to limit some sun with plants or canopy/pergola. I have learned the hard way over the years with numerous ponds to treat the problem not the symptoms.