Tetra Pond Block 4 Count, Controls Algae Growth In Ornamental Fish Ponds (16735)

I’m really pleased with this product! It arrived promptly and was in excellent condition. It’s just as described, and the quality is outstanding. It works perfectly and has made a real difference. I’m thrilled with my purchase and feel it’s worth every penny.I’d highly recommend this to anyone looking for something dependable and high-quality. I’ll definitely buy again!

Update 6/15/16- I have already purchased my second package of these, I am that happy with the results. I had to use a few to get it going, and then I think my turtles ate one! Seriously, it was only half dissolved this morning and now it is gone. They are acting fine, added a new one up on the waterfall so they can't get at it this time. I will never be without these again. Will look into getting the big tub of them next time.My pond was a big green mess. I previously tried barley bales and liquids which did nothing at all. I decided to try these algae control blocks and am glad I did. I just received these 2 days ago, and already I can see my fish, turtles and the bottom of my pond again. Still has a ways to go to be totally clear, but I am amazed. I dropped 2 of these tablets in along with one of their sludge reducer blocks. My pond is not large, it is a preformed plastic one we bought at Home Depot, I think 250-300 gallons. Nothing I have ever tried has worked, summer is the worst, full of algae all season long. As well as being able to see to the bottom and my animals again, the walls of the pond are clear from the thick algae that was growing. I don't have any plants in my pond, as the turtles eat them the instant I put anything in, so I can't speak to the safety of plants but the turtles, goldfish and mosquito fish are all a-ok.I know, it doesn't look great, but if you had seen it before... Fish and turtles were not visible 2 days ago. I will post another picture/time frame once it is clear. Second picture you can see the bottom of my pond. Still needs to clear up a bit, but after 3 days the bottom of my pond is visible again!

Took almost 4 weeks and 2 tablets to get our small pond/ fountain clean. My fountain wasn't too dirty, just started to notice that the water started to get a green tint so I wanted to get a handle on it before it got worse. My pond/fountain is about 40 gallons with plenty of shade and is always running. I thought the tablets weren't going to work but after adding another tablet after about 2 weeks the water started to clear up . They take a long time to dissolve so that coupled with the long amount of time it took for them to be effective leads me to believe that they are extremely slow release and patience is needed.

I was very skeptical about this product. I didn't want to lose any fish and I didn't want to waste money on something that did not work. Our pond algae was out of hand. I placed a block in the waterfall area so it gradually broke down as water flowed out. Just as all the other reviews stated within the first week an incredible difference. One week later, I placed another block again, and the water is nearly clear and I haven't lost any fish.

Prior to putting 2 pond blocks into our pond, the water was almost pea soup. The pond is about 300+ gallons and after about a week, the water was clear and I could easily see the bottom. Simple to use with great results. 5-STAR

I liked the ease of use and the promise of helping with the algae problem. But when the entire pond water turned green I started noticing that the cubes were still the same as when I put them in. It didn't meet my expectations. I am glad I canceled the repeat delivery; I still have one of the two boxes I originally bought.CSD, Bremerton, WA

I absolutely love these tabs. My pond is in the sun all day so algae was kicking my butt. It’s a pain to try to drain down scrub and keep the pond clear. I put one of the tablets in the waterfall and within a week my pond was crystal clear and every piece of algae was gone. I had quiet a bit of algae buildup prior. I have river pebbles on the bottom of the pond and they were all green now look wayyyyy better. My waterfall was completely covered in algae as well. I have about a 500gallon pond but only use one tablet at a time. Being in the waterfall I have to replaced about once a week vs month Now that the algae is under control I’ll probably just drop one by the pump and replaces as frequently.

Works far better than the others I have tried. I look no longer. This is the one!