It works as advertised, be sure to use small amount. I used half amount of dosage to ensure fish safety.

I picked this stuff up after going through 3 algae blooms in my 10-gallon tank (including one really bad one, couldn't see two inches past it, and the other two being much more tame).Now, I've read MANY mixed reviews on this product before making my purchase, and I have one thing to say. This is basically Weed-B-Gone for aquatic environments. It's made to kill algae. It's safe for fish IF USED RESPONSIBLY.We've treated two tanks with this stuff: a 60 gallon, and 10 gallon. No fish died.The 60 gallon: heavily infested with algae, specifically the brown hair algae. Applied the recommended dose (1 tsp per 50 gallons, we did a full dose). In the tank live two Convict Ciclids, two loaches, two kissing gourami, one minnow, and one otocinclus catfish. The tank itself is very well established bacteria wise, and has an appropriate canister filter going with four sponges and bacteria media. The lights on it are low-light, with one low-light grower. NONE of the fish were affected in any way shape or form.The 10 gallon: houses my one Oranda goldfish, along with 7-8 trumpet snails. Previously had ghost shrimp in it, but took them out prior to treatment, then ended up dying from separate causes (put three in a bowl, two died, the rest were killed by the stress of my goldfish chasing them and trying to eat them, I don't plan on getting any more, lol). As I stated above, went through three algae blooms/cycles before I bought this, and has an AquaClear 30gal. filter going with two sponges and bacteria media. The light on this one is a 96wat four tube grow light. The light penetrates a solid inch into the gravel, it's intense.WHEN I DOSED MY 10 GALLON: bottle says 1ml/10 gallons. From what I'VE been personally taught from my boyfriend (his 60 gallon has been running for 10+ years with absolutely no problems), the more gravel that is in the tank, less water; resulting in a smaller dose. I put HALF of 1 ML in the tank. My goldfish is UNAFFECTED, and my snails are as happy as could be cruising around. After repeated dosages, and even one dose being a full dose, my fish is fine. And now after about two weeks, I've seen NO new algae growth, AT ALL. I'm going to continue treating the tank, as it is planted and the algae has taken a liking to the plants, but as far as I can say, nothing has perished in my tank using this product, other than algae.With more heavily infested tanks: from the 60 gallon, it's petrifying to watch. When you treat it, the water will cloud up almost IMMEDIATELY. And it is and was scary to see it happen so fast. It was back to normal clarity overnight.Further research into this also relieved that the chemical diminishes in 24 hours, being completely gone by 48 hours. Example: I haven't changed the water in my 10 gallon since I've started using it. By the amount of chemical I've put in, I'm positive my fish would've been long gone by now. But he's still in perfect shape and health.Everything being said: use this with CAUTION! This is not a magical algae fix (well, was for us....), this is made to kill algae, and I'm sure with inappropriate usage, will kill a lot more than algae, including what is printed on the label. If you have any doubts about getting this product, find something else. And if you get it, use your brain. It's easy to over-dose, and some things just don't work with some people. In my case, I began with a half dose, because my tank is one of the fairly smaller ones, and I wanted to see just how my fish reacted to it. I gave it a day, then repeated the half dose, waited, continued with a full dose over the course of a week and a half. It's not the products fault, as it's working BEAUTIFULLY for our own tanks and MANY others.

I bought this large bottle for my 120 Gal, it is defiantly worth buying large ones instead of buying these little bottles at my local pet stores, it save me money and I will definitely buy it again.Would recommended for anyone with large tanks.

works beautifully yes works it does can not complain about this item at all iam just filling up space right now

This product is very effective at controlling algae in our 135-gallon freshwater planted tank. We have an aquarium with strong lighting; automated liquid plant nutrient dosing; and CO2 infusion. These conditions are great for fostering luxuriant plant growth but algae growth can also occur if not reined in by a product such as AlgaeFix. AlgaeFix gets the job done.

This is a fantastic product. I struggled with algae for quite some time and 2 hours after the application of Algaefix the water was crystal clear and it made my fish smarter. I was once told that goldfish have a 30 second memory span but I was able to teach them the alphabet forward and backwards... and they remembered for days. Now they can recite it backwards faster than I can. Even last christmas they were singing Christmas carols in little santa hats. Seriously though... this stuff works and very well!

I read the aquarium reviews and was surprised at the ineffectiveness of the product. but is sure works in my pond. Until this product was available, I tried all the usual treatments, barley bails, etc. I can't remember them all and nothing worked against string algae in my 1200 gallon garden pond. I have turned off the UV light in the filter as I don't need it. It doesn't harm the fish or the flora. I just put it in at the waterfall. I don't even bother to measure it any more, a splash out of the container and the algae turns blonde in a few days, falls off the pond liner, and is filtered out. I try to catch it early in the season so it doesn't have to kill it; it keeps the algae from forming at all. I put it in when I think of it, or if I am negligent and see algae forming, but I try to put it in about every 3 weeks or once a month and the pond stays crystal clear. Downside...have to keep extra plants to give the fish a place to hide as preditor birds can see and catch the fish too easily. ;-)

I've used this product for several years. I occasionally have an algae problem in a 55 gallon tank, and I've found that within a few hours of application, my tank water is crystal clear and I've never noticed any adverse effect on my fish. I'd highly recommend.

I have a 100 gallon tank, and a high phosphate level in my local water system. Since algae thrives on phosphates, my tank was nuclear green! I tried adding PhosGuard in my canistar filter, though it didn't seem to make a difference.So I added 2tsp of Algae Fix and BAM! Within 2 hours it was crystal clear. Would definately recommend this to others fighting Greenwater Algae!

Great product. Certainly helped in removing the algae from my pond. I would certainly recommend this product.