POND ALGAEFIX (1 gallon) Pond Algae Control - Copper Free - Clean, Clear Water - Up to 38400 Gallons - Safe for Fish, Plants - Water Gardens, Fountains - Natural Active Ingredient - EPA-Registered

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.

Works great! This has been the best solution to the algae in my pond and on the rocks in my waterfall without harming my fish! Highly satisfied!

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.

Great product, cleared my pound of an insane amount of hair algae in 3 days. Water lilies and fish show no signs of stress.

If you are having major string algae problems - read here! We own a 2000 gallon multi-waterfall pond that sits in direct sun in the front yard. The last 2 years we've been in the house, we've battled with constant string algae. The previous owners had the same issues. If you use Algaefix IN CONJUNCTION with Biosafe GreenClean (another product) you will have awesome results. First thing - everything with string algae is about prevention. Once the "bomb" has started and left un-checked it is extremely difficult to slow down and stop. This product WILL NOT kill and control algae once "the bomb" has started. Well, it might if you dump the whole bottle in per treatment, but that's a lot of money! The hotter it is, the sunnier it is, the worse off you'll be. Your prevention starts in spring. 1st, do a major water change in the pond - I recommend a minimum of 50% if possible. Once changed, begin treating the pond for the first week with Algaefix every 3 days - then after the 1st week, back up to once a week. I recommend the big bottle. You'll need it. The one thing Algaefix does an AMAZING job on is suspended algae (green water) and water clarity. After the first 2 treatments you'll notice crystal clear water. As the dog days of summer approach, you will start to have small patches of string algae appear, here and there. These spots get treated directly with Biosafe GreenClean (see my very-similiar GreenClean review). It will dislodge the algae and make it float, and a simple pool-net (also a handy must-have) will remove it easily. So far this summer, my pond is crystal clear, with very little maintaining at all, where last year, I was literally pulling out 4-5, 5 gallon buckets of green slop every week. Stay on top of it early, and use both products - Algaefix as a constant-maintainer, and sprinkle in GreenClean directly on top of all spots where you see algae beginning to form!

I'm torn when it comes to this product. I started using Algaefix last year, and the results were truly incredible. Overnight (quite literally) my pond went from a soupy, stringy mess to see-to-the-bottom clear. So of course, I bought more of this for the 2015 season. After my first application this year, I'm wondering if they switched to a new formulation. Here's why: Our pond had a pretty heavy algae bloom this spring. The water was green and like last year, I had a lot of string algae and floating algae. I dosed the pond with the same amount of Algaefix that I used last year and like before, the water cleared up significantly overnight. However, this time around, my fish were VERY negatively affected. I have a few small koi and a few goldfish in my pond and when I checked on them the morning after treating, they were all hanging listlessly at the surface or on the floor of the pond. Those at the top weren't gasping, just hanging there. They were so sluggish that I was actually able to reach in and pick one up with the fish putting up almost no struggle! I thought for sure they would die. I have a waterfall, a spitter, and two aerators in my pond, so this was clearly not a result of having too little oxygen (something the directions warn of for this product). About three days after treating, the fish are now moving around again. I'm torn as to what to do and how to rate this product. On one hand, it does work, and it works very well. However, I'm concerned that continued use may stress or even kill my fish. If you have fish or other aquatic animals, you might consider trying something else first. If you're fighting a really bad algae infestation or don't have aquatic animals, though, this is admittedly a good product for removing algae quickly and efficiently.

This really works because I pour a lot into the pond with out of control algae growth. I didn't even read the instruction, just dumped a cup or two. The algae turned brown and completely stopped. I haven't seen any more growing since about a month after using the product. Two weeks after, I added some fish in there and they are OK.

This is without a doubt the worst pond algaecide product I’ve ever purchased. I used this the day after the water feature guys cleaned and filled the pond. Three days later I added a bit more. The next day the pond water was green - not cloudy - green. A guest said the pond looks like the Chicago River on St. Patrick’s Day. It does. The pond water looks as though it’s dyed. I called the 800 number on package and I have left two messages. No one has responded. Caveat emptor!!!!!!!!!!! I had to give a one star rating in order to post the review, this algaecide is a waste money.

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.

This product works very well. Fish are very happy and I have a beautiful pond once again.