Customer Reviews

Rating: 4.2 of 5 stars 16 Reviews 16 Reviews 4.2 out of 5 Stars

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94% Recommend

94% of reviewersrecommend this product

Rating: 4.2 of 5 stars 4.2 / 5

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Tetra Algae Control Pond Block Water Treatment

Tetra Algae Control Pond Block Water Treatment

  • Most Helpful Positive Review

    Read All 13 Positive Reviews

    Amazing Pond Block

    By guearyt on Dec 11, 2020

    Pond Block is now a must for my Koi pond. I have tried numerous chemicals and natural solutions. They worked very little or none at all. In one day Pond Block had my pond water clear. The liner algae is continuously going away.

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  • Most Helpful Critical Review

    Read All 3 Critical Reviews

    Poor packaging

    By FormerCustomer on Apr 2, 2020

    The package was not properly packaged and arrived two weeks after the order. Although the box was undamaged, the lid of the jar inside was broken into three pieces and all the contents were scattered inside the box

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16 Reviews

Showing 1-10 of 16 Reviews

  • 5 out of 5 stars

    Amazing Pond Block

    By on

    Pond Block is now a must for my Koi pond. I have tried numerous chemicals and natural solutions. They worked very little or none at all. In one day Pond Block had my pond water clear. The liner algae is continuously going away.

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  • 1 out of 5 stars

    Don’t waste your money!

    By on

    No difference between before and after use of this product in my pond!

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  • 5 out of 5 stars

    absolutely the best for my turtle/Goldie pond

    By on

    Hands down the best algae and sludge and cloudy water cure I have ever used in 12+ years. I have don’t the liquid pour in, the rock salt in the filter, vacuuming daily, you name it-we’ve used it. I got these on a whim and thank god, they have been a game changer. My pond gets full full hot sun all day and turns to pea soup quickly. Sure I get huge goldies from the algae but I look to see what my pond looks like rather than a dark green sludge farm. I have only used 6 tablets in my 400gal pond so far and absolutely loving them. So easy so simple and they work. I can’t rave enough about them. Until your have a large red ear slider, 12+ large goodies and live feeding you have no idea the work involved Hands down the best algae and sludge and cloudy water cure I have ever used in 12+ years. I have don’t the liquid pour in, the rock salt in the filter, vacuuming daily, you name it-we’ve used it. I got these on a whim and thank god, they have been a game changer. My pond gets full full hot sun all day and turns to pea soup quickly. Sure I get huge goldies from the algae but I look to see what my pond looks like rather than a dark green sludge farm. I have only used 6 tablets in my 400gal pond so far and absolutely loving them. So easy so simple and they work. I can’t rave enough about them. Until your have a large red ear slider, 12+ large goodies and live feeding you have no idea the work involved in keeping a pond looking somewhat ok. Now my pond is crystal clear, the rocks inside aren’t even covered in algae anymore. Like I said hands down game changer and now a customer for ever. … more

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  • 1 out of 5 stars

    Poor packaging

    By on

    The package was not properly packaged and arrived two weeks after the order. Although the box was undamaged, the lid of the jar inside was broken into three pieces and all the contents were scattered inside the box

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  • 5 out of 5 stars

    Helps control

    By on

    Been buying it for years, always had fountains in the houses I lived in and when the weather gets warm the algae gets bad. It really helps

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  • 5 out of 5 stars

    Highly recommend

    By on

    I dont like using chemicals in my outdoor goldfish pond. Last year the algae and sludge were a nightmare towards the end of summer. I couldn't even see my 8 goldfish. Nothing i did naturally helped. After doing ALOT of research on this product, i decided to give it a try. I also use the API Sludge Remover which isnt a chemical. Its been 2 weeks and i can finally see my fish. If your pond is bad, this product will NOT work overnight as some claim. You still need to put some time into helping these products along. At first, i was cleaning my filter pads 2x/day. Now i dont have to change them but once every other day. You also need to net out the dead algae. No scrubbing tho. I don't have I dont like using chemicals in my outdoor goldfish pond. Last year the algae and sludge were a nightmare towards the end of summer. I couldn't even see my 8 goldfish. Nothing i did naturally helped. After doing ALOT of research on this product, i decided to give it a try. I also use the API Sludge Remover which isnt a chemical. Its been 2 weeks and i can finally see my fish. If your pond is bad, this product will NOT work overnight as some claim. You still need to put some time into helping these products along. At first, i was cleaning my filter pads 2x/day. Now i dont have to change them but once every other day. You also need to net out the dead algae. No scrubbing tho. I don't have time for heavy pond maintenance so I am glad i found both of these products. I will always keep them on hand plus use the minimal amount just as a maintenance regime. I am extremely pleased with these products and would highly recommend them. But again, you must have patience as these products will not work overnight. … more

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  • 5 out of 5 stars

    Great stuff!

    By on

    Having an algae growth due to the weather. These blocks kick butt!!

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  • 4 out of 5 stars

    Hot weather

    By on

    It definitely worked. My fish come to the top for feedings & it's great to see clear water Thanks

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  • 5 out of 5 stars

    Another Satisfied Customer

    By on

    Love this product and have used it for years. It's my top choice for algea control. Shipping was prompt and on time. Customer service is top notch.

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  • 5 out of 5 stars

    Great product and speedy delivery

    By on

    I've tried alot of different products but this one beats them all and Chewy delivered faster than we imagined they would.

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