Tetra Algae Control Pond Fountain Block Water Treatment, 6 count

By Tetra
Rated 3.7059 out of 5 stars
$7.48Chewy Price
$8.09Chewy Price
$7.11Autoship Price
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About This Item


  • For containerized ponds only
  • Limited to use for backyard or homeowner ponds and water fountains
  • EPA approved
  • Not for use with live plants
  • Safe for fish but not for use in non-ornamental ponds

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Fish TypeKoi & Pond FishKoi & Pond FishKoi & Pond FishTropical FreshwaterBetta
Aquarium TypePondPondPondFreshwaterFreshwater
Top IngredientsBarley Straw

Questions & Answers

4 Customer Questions

I have a 10 gallon fountain that needs a nonclorine product to control the algae. And something that will not damage the plants below the fountain when splashed on. Will this Fountain Block be safe for the plants below the fountain?
Answer by ChewyJan 10, 2018
This product is not intended for use with live plants.

Can this be used to prevent algae in pet water fountains?
Answer by ChewyApr 13, 2018
This product is not recommended for use in drinking water.

I have a small water fountain (not part of a pond) that occasionally the dogs sneak a drink of water out of. Would I be able to use this to control the slightly cloudy water and beginning stages of green guck?
Answer by ChewyAug 15, 2018
This treatment has not been tested for safety if dogs drink the water, it would not be recommended.

will this product repel frogs?
Answer by ChewyAug 28, 2021
This treatment will not repel frogs.

ReviewsWrite a Review

Rated 3.7059 out of 5 stars
17 Ratings
Would recommend to a friend

17 Customer Reviews

Rated 3 out of 5 stars
By Sue on Jun 2, 2023

Tetra algae control

Just isn't working as well as I had hoped. Water stays cloudy will look for another product.

Rated 5 out of 5 stars
By BAM on Jun 6, 2023

pond pellets

these "pond" chemical squares "help" my fountain stay clear

Rated 5 out of 5 stars
By FDLT46 on Jul 21, 2022

Clear as Mountain Water

We just recently had our Pond redone. For 3 weeks the water never cleared up and started getting a green tint to it. Added 3 Fountain Block tablets and 2 days later the pond was clean and clear. Tried other products within those three weeks. I highly recommend Fountain Blocks!

Rated 5 out of 5 stars
By dexter on Jan 13, 2022

easy purchase

Good product, easy transaction . I would recommend this web site.

Rated 5 out of 5 stars
By axel on Aug 26, 2021

good for a smaller pond

it did turn the water from algie to clearer but still cannot see the fish , perhaps like my headline,if my pond was smaller would do the job! And at least it does not harm the fish!!!

Rated 5 out of 5 stars
By SuzyQ on Apr 17, 2021

Algae Control Pond Fountain Block Water Treatment

I just started using this product, but it already is working very well. I would recommend it. The blocks are small, unlike the big round tablets that you usually would use, so it looks a lot better in the pond and does the same job.

Rated 1 out of 5 stars
By Bonnie on May 19, 2021

Poisonous to wildlife

It said safe for wildlife on it so I bought it then I read the package it is not safe at all so unable to use it

Rated 1 out of 5 stars
By VICKY on Feb 12, 2021

not working blocks dont dissolve in fountain would like a refund please

would like a refund fountain bocks are not dissolving and therefore are not cleaning my fountain!!!!!! plea se contact me regarding this matter. Thank U

Rated 1 out of 5 stars
By Tmunden on Jun 30, 2020

Didn't Work

We put 2 tablets in the fountain and it didn't do anything to get rid of the algae. This was after we scrubbed the fountain down, added fresh water with the tablets and algae still grew.

Rated 5 out of 5 stars
By CleanFountain on Aug 19, 2019

Clean Fountain

We put it in our fountain and it works amazing. Our fountain would be green by the next day when it’s hot. We put the tablets in the water and it’s been green free for weeks on the middle of summer.