API POND ALGAEFIX Algae Control 32-Ounce Bottle, FISHAQUARI (169G)

API POND ALGAEFIX works wonders! It quickly cleared my pond’s green water and string algae without harming fish or plants. Easy to dose and effective within days. A must-have for pond owners battling algae overgrowth. Safe, reliable, and keeps water crystal clear. Highly recommend this 32-ounce bottle—great value for the results!

API POND ALGAEFIX is a game-changer for algae control! It works incredibly fast, even on a heavily algae-filled pond, leaving the water clear and manageable in no time. The results speak for themselves—this product is a must-have for anyone dealing with stubborn algae issues. Highly recommend!

LONG REVIEW, BUT PLEASE READ!!!Okay, so my pond is in 100% full sun so I have been dealing with warm, pea soup chlorella (planktonic) algae bloom all summer long. Not bad for the koi, but unsightly to the eye. All I wanted was to see the bottom of the pond and my koi through crystal clear water. Isn't that what all of us koi pond owners want? Well, I finally caved and decided (per my brothers recommendation) to start looking into a non-copper algaecide. I am very familiar with APi products and trust the company, but after doing research and reading up on plenty of positive and negative reviews I was a bit leery in adding an unpredictable and unnecessary chemical to my pond, but I was so tired of the not seeing the true beauty of my koi and the green water didn't smell great either. Please note that all water parameters are spot on: Ammonia 0, Nitrite 0, Nitrate 0, PH 8.2 (evening), KH 14 Drops. Pond is approximately 5000 gallons with a lot of filtration (won't bore you with those details), including a UV filter, as well.Anyway, I called the company and left a voicemail for them to call me back because I had some questions regarding the negative reviews. They did return my call, but I missed it and I never called them back. I decided to purchase the product and dose carefully. A few things I know is that aeration plays an important part when using any algaecide. IT IS THE MOST IMPORTANT THING.....BUT.....Here is my experience with using this algaecide.So, my first treatment went very good, fish acted very normal and they didn't seem to notice anything different. I (Please note; I added each treatment along with a natural cleaning bacteria to help break down decaying algae) By day two I noticed a slight clarity in the water. It was definitely working. I did a 10% water change at the end of day two. I waited the recommended three days before doing a second treatment. My second dose went just as well. No issues and koi were just fine. By the end of my second treatment, I could see three feet down! That's 6 days after the first treatment and water was much more clear. It was working! Now, on day 6 before my third treatment I did a 20% water change to help remove the dead chlorella in the water column and did that using my go-to dechlorinator Sodium Thiosulfate. My intention was to add my third and final dose the next day but I forgot and I added the algaecide right after the water change. As soon as I added it I knew it was a BIG MISTAKE not to have waited at least 24 hours after the water change! DO NOT MIX THIS PRODUCT WITH ANY OTHER CHEMICALS WITHIN AT LEAST 24 HOURS OF USING THIS PRODUCT! All of my koi almost instantly disappeared to the bottom of the pond and some were seen darting around. I though I just killed my beloved koi and there wasn't much I could do about it. Doing another water change with the necessary dechlor would probably do more harm than good so I added 10 lbs of charcoal to the waterfall. I didn't see my koi at all the rest of the day. I thought for sure I would wake up to 27 dead koi in the morning. However, I woke in the morning to find all my koi swimming happily around looking for their breakfast.So my suggestions: AERATE AERATE AERATE (simple waterfall isn't enough aeration) and DO NOT use with ANY other chemicals, especially dechlorinators such as Sodium Thiosulfate. I HIGHLY recommend NOT doing water changes within AT LEAST 24 hours of using this product. That is what will be detrimental to your koi and other fish. If fish show signs of stress, increase aeration and add carbon to remove the chemical agaecide.So, in conclusion, here are the pros and cons of this product:PROS:~Is highly effective against chlorella algae blooms (pea soup syndrome, I call it) Knocks back Chlorella blooms withing a day or two~Works fast~Easy to dose~Cost effectiveCONS:~Will harm your fish if used within 24 hours of doing a water change with dechlor (should say on the bottle, but doesn't). API should put that on the bottle. ALWAYS AERATE.~Does turn dead carpet/hair algae a very ugly black color after killing it. But that's normal.Hope this helps!Took a LOT longer to see results in killing the little amount of spring algae I had in the pond, but that wasn't my target.

I would give this 6 stars if I could. This worked amazingly well and fast. I literally removed the algae growth (and I had a lot in my outside water feature.) Be sure to treat your water every 2 weeks and your water feature stays nice and clear. Not harmful to fish or birds, so that was a plus.

Works fast, safe for fish, and keeps my aquarium clean. Highly recommend!

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.

Works great, Kills the algae right awayBeware that it will kill fish too,When using in a pond or fish tank I recommend only using half of the required amount and make sure that you have tons of air bubbles and water flow this stuff once it kills the algae it removes the oxygen from the water fast.I use it in both my water fountains outside year round to keep them looking like new all year. never have to clean them by hand.