API Pond-Zyme Sludge Destroyer Pond Sludge Remover, 8-oz jar

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About This Item

Details

  • All-natural additive uses specially selected bacterial strains to break down fish waste and dead algae.
  • Breaks down and digests leaves and grass clippings that can fall into your pond.
  • Removes and clears cloudy water, sludge build-up and debris that clogs pumps and filters.
  • Designed for ornamental pond use and comes in multiple sizes to best serve your pond needs.
  • Safe for all pond fish, plants and wildlife, and reduces pond maintenance.

Instructions

FAQ

Learn More About API From Our Team of Experts

Questions & Answers

13 Customer Questions


Should we turn off the pond pump to give this product time to sink before the skimmer pulls it in? Ty

Answer by Chewy • Mar 30, 2018
The pump should be left on when using this product.

How many gallons does the 16oz bottle treat? Our pond is approximately 650 gallons.

Answer by Chewy • Mar 23, 2019
The 8 ounce container treats 8,000 gallons and the 16 ounce container treats 16,000 gallons.

I have two alge eater's will it be ok to use this product in My pound?

Answer by Chewy • Jun 18, 2018
This all-natural additive uses specially selected bacterial strains to break down fish waste and dead algae. It is safe for all pond fish, plants and wildlife, when used as directed.

What is the end of season for this product?

Answer by Chewy • Aug 15, 2022
We would recommend to add 4 teaspoons per 200 U.S. gallons of API Pond Zyme twice a week for two weeks for spring start up and end of season application.

4.5
Rated 4.5 out of 5 stars
112 Ratings

36 Customer Reviews



Rated 4 out of 5 stars
By Tee on May 4, 2025

It has barley in it.

I filled a 252 gallon outdoor tank with fresh well water and a few hours later added the amount specified. The next day, there was what looked like a film over

I filled a 252 gallon outdoor tank with fresh well water and a few hours later added the amount specified. The next day, there was what looked like a film over ther water. I stirred the water and at least half the dose disappeared, mixing into the water and heading to the bottom of the tank. With movement after the powder soaks up the water and becomes moistened, the material is finally able to sink. Just by the smell I know it is a good product but am afraid that my large goldfish might breathe the stuff in. I am going to use it only when I can see a need to add some, just as a protective measure for my fish.


Rated 5 out of 5 stars
By Jill on Oct 13, 2025

Cleaner pond

got rid of all the sludge in my 9 ft. goldfish pond in just two doses.

got rid of all the sludge in my 9 ft. goldfish pond in just two doses.


Rated 5 out of 5 stars
By Lori on Jun 26, 2025

Consistent results

I have used Pond-zyme since 2000 in our ornamental goldfish ponds that ranged in size from 500 to 1,400 gallons. Simple to use with solid results.

I have used Pond-zyme since 2000 in our ornamental goldfish ponds that ranged in size from 500 to 1,400 gallons. Simple to use with solid results.


Rated 5 out of 5 stars
By Stewart on May 7, 2025

what i needed almost sooner than i needed it

Chewy has almost everything i need for my Golden and goldfish at a competitive price and delivered fast! I've bought from them for years and can't recommend them

Chewy has almost everything i need for my Golden and goldfish at a competitive price and delivered fast! I've bought from them for years and can't recommend them enough.


Rated 2 out of 5 stars
By June on May 9, 2025

Not as effective as I'd hoped.

I was not impressed. I have a small inground pond and product is not very effective. Disappointed. Will not buy again.

I was not impressed. I have a small inground pond and product is not very effective. Disappointed. Will not buy again.


Rated 5 out of 5 stars
By Kman on Oct 13, 2025

It works

Does what it says it does.

Does what it says it does.


Rated 5 out of 5 stars
By Ludy on Jul 9, 2025

Works great!

Love this product. It keeps my koi pond clean and clear.

Love this product. It keeps my koi pond clean and clear.


Rated 5 out of 5 stars
By John on Jun 5, 2025

On time

Your service is GREAT. Can't believe how fast my order comes.

Your service is GREAT. Can't believe how fast my order comes.


Rated 5 out of 5 stars
By Roger on Aug 9, 2025

Sludge Destroyer

Tried it and it is working great.

Tried it and it is working great.


Rated 5 out of 5 stars
By Tom on Sep 7, 2025

Good delivery

Every thing works out fine

Every thing works out fine