API POND ALGAEFIX Algae Control 64-Ounce Bottle (FF-169D)

This stuff is amazing! I have a 40 gallon freshwater tank with lots of tropical fish in it. My tank is well established, but I've been having some issues with algae growing on the tank decorations and on the glass. I do water changes about once a week, I also have a very good quality canister filter. But managing the growth of algae was a major problem. So I bought a bottle of the Algaefix and I used exact as directed on the bottle. Within a few hours my tank was crystal clear. I couldn't believe how fast and efficiently it worked. I'm happy to report that all of my fish are doing very well. This product did not harm them at all. I definitely recommend this to anyone who's having an issue with too much algae growth, just be sure and follow the directions on the amount to use.

Excellent product, easy to use, works quite fast! Water in my little pond is clear! Highly recommend. I will be returning. Thank you.

Works better than any other product I've tried to control various forms of algae in a 3000 gallon pond. Water gets and stays clearer than I've seen it previously when using other algae control products. I don't have any fish to be concerned about but it hasn't harmed any of the water lilies or other pond plants. Only downside is for me it can be a bit expensive if I use as much as the directions say every week, so I'll often stretch out the applications to a lesser frequent schedule and I've found a frequency that works well for my situation.

Works very well. Have bought it for several years. A little pricey but works.

I have used this in my fountains for years. Works well and is a great product when used as directed. Excellent water clarity

Maybe I was doing something wrong but this product didn’t put any dent in the algae over growth in our fishpond. Getting a GOOD UV light in a special filter outside of the pond, DID WORK PERFECTLY, but I put in several doses of this liquid product into the pond, as directed, for several months before getting the UV light. During that time I never had any improvement in the algae situation. So I can’t actually recommend it highly.

This stuff is great, we had it years ago and tried other things but after a couple years of the water being a solid green color (you could maybe see things that were an inch or so down, otherwise totally opaque) I ordered this again and within a week (two treatments) we can see through to the bottom again. The fish and plants don’t seem bothered by it either. My one complaint would be that the cap leaks, though it was fine until I took the lid seal off (so no leaks during delivery). Be careful when shaking the bottle so you don’t get splashed.

I've been using this product for years now - I had it on subscription so it sent me a bottle every 6 months. It was all fine until this latest bottle. I put it in a tank and it killed 5 fish. Thinking I may have just mixed up the dosage, when I used it again, I was super careful about dosage. If I didn't notice them acting funny a moment too late and pulled them out and gave them fresh water, another 5 would have died. There was a very strong filter with waterfalls and airs stones, so it wasn't oxygen deprivation. Again, I thought maybe it was just too concentrated for aquariums, so I kept the bottle. I put the baby koi I had in the aquarium out in the pond. There was a lot of algae so I put in the dosage required. It killed one of my adult fish that I've had for years and 3 of my 5 babies. The other two are not out of the woods yet and I've done 2 water changes and its been 3 days and I'm worried about my other adult fish. I was hoping for mating this year, but I doubt they will be able to because they are so close to death. All my mosquito fish except 5 (out of about 1000) have died. Again, this is not about oxygen deprivation, they aren't gasping at the surface. they flash, then die at the bottom of the pond. They won't even float after the death. I don't know what was wrong with the bottle, but don't trust this product. If its bad, it will kill everything and I'm so horrified to loose all my fish. I've been having nightmares and its just awful. DO NOT BUY THIS PRODUCT!! Edit: contacting the manufacturer does nothing either. They won't answer their phone and won't reply if you leave a message. They send a sweet little "call this number" email to every negative review, but apparently won't actually do anything about it. Terrible customer service. I refuse to buy any products by them now. Edit #2: So, I realized that I miscalculated the pond size and thought it was half the volume it actually was. So I was putting in half the recommended dose and it STILL killed my fish

Ordered on 10 January 2025. Delivered on 20 January 2025. Thank you.

excellent

It works but expensive for ponds

It beats buying the smaller bottles.

Amazing results on just two days. Two months of algae bloom due continuous rain and sunny weather. Never experienced this in with my pond before. Fishes could no longer be seen. Fantastic API Algaefix ... My pond is restored to be crystal clear again.