Tetra Pond Fountain Block 6 Count, Controls Algae Growth In Ornamental Fountains

I've been looking for a quality algae control for awhile. The liquid ones have gone up in price but don't really control the algae that grows in my fountain. This one does the trick and is reasonably priced. We placed this in the fountain and it goes to work. No need to remember to add it quickly. We were gone on vacation and thought for sure we would need to clean the fountain upon our return, but no, the algae block did its job. Would definitely recommend if you have an algae problem.

My small waterfall/pond was getting overrun by green algae. A friend recommended this product, so bought it and once in hand, dropped a single small block into the pond near the pump inlet. Within a few days, water was clear again, and within a few weeks, all the stones were clean again. Pretty amazing. The package label is a bit confusing though, because it shows pictures of fish on it, like for use in Koi pond, but fine print says it will kill fish and birds. Not sure about the actual dangers, but the newts we have running about during rain (and getting into the pond) have not diminished in number.

Product works well. I've been using this product for quite a few months. Used to get it in larger size (28 g each). This is only 12 g each. Unfortunately, the larger size in bulk cannot be sent to CA, because of Prop65 (what a joke!). Widh they can sell the larger (28 g) size block in small quantity to get around CA Prop65. All in all, am satisfy with the product performance. Just make sure you are aware that this is only 12 g each, good for treating 30 - 100 gals.

I cut these in half to use in my small fountain. They do not totally eliminate the algae, but they really do help. Last a couple weeks or so. Shipping time was slow, but now I have a year's supply.

Product works well ... but I got sent the single block instead of the 6 pack as advertised and they sent a replacement but it was sadly also just one block. So I'll go elsewhere to get this product

I am amazed at how well this product works. The block (size of an ice cube) has lasted for 30 days and is still working. I have tried numerous liquid products and although they work, they do not last very long. I highly recommend this product and will definitely buy again.

Did not work. Filled fountain, added tab of product, water was green within the week.

I use this product in my garden fountains and have found it to be the best product to keep my fountains from getting algae. Very convenient and easy to use. I put this in my fountains every two weeks.

Killed my fish