API Turtle Sludge Destroyer Aquarium Cleaner

Rated 4.069 out of 5 stars


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$8.48Chewy Price
$11.98Chewy Price
$8.06Autoship Price
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Top IngredientsDI Water, Sodium Thiosulfsate, Sodium Carbonate...Sodium Thiosulphate, Disodium Edta.

About This Item


  • Cleans aquarium using beneficial bacteria.
  • Breaks down organic waste and debris.
  • Reduces maintenance and establishes cleaner, clearer water.
  • Helps eliminate odor.
  • Safe for aquatic turtles, newts or aquatic frogs.

See More



Play Video: Learn More About API From Our Team of Experts
Learn More About API From Our Team of Experts

Special Note
  • 4-oz bottle treats up to 236 gallons.
  • 8-oz bottle treats up to 474 gallons.

Questions & Answers

8 Customer Questions

Does this product work well with cleaning water?
Answer by ChewyAug 03, 2017
This product creates a cleaner, healthier environment and reduces aquarium maintenance.

Is it safe for fish
Answer by ChewyFeb 28, 2021
The Turtle Sludge Destroyer is safe for all aquatic pets including turtles, frogs, newt, fish, etc. It contains only the live bacteria that break down the sludge and these bacteria are completely nonpathogenic and completely safe for all life.

Can I put this in with my turtle
Answer by ChewyDec 26, 2022
This may be added while a turtle remains in the water. For best results, dose weekly, or when performing a water change. For extremely dirty vivariums/aquariums, dosage may be doubled.

Will this product work along with the Stress Coat?
Answer by ChewyNov 03, 2022
The API Stress Coat and the API Turtle Sludge Destroyer are compatible and can be used in the same aquarium concurrently. Make sure when using any new water that it is dechlorinated first (with Stress Coat or other dechlorinator) before use of any bacterial product (like the Sludge Destroyer) to make sure the bacteria is not exposed to chlorine or chloramines in the tap water.

ReviewsWrite a Review

Rated 4.069 out of 5 stars
58 Ratings
Would recommend to a friend

56 Customer Reviews

Rated 1 out of 5 stars
By Jessica on Sep 19, 2023

Does Not Work

I added this to my 40 Gallon turtle tank, the water is not full in the tank, maybe half way because my red ear slider turtles are semi aquatic. I added this to water that already had algae and it did nothing, I added this to clean water tp prevent algae and it still did not help the problem. I am not sure if my live plants are causing the algae problem but regardless this product unfortunately did nothing for my tank but make it a little cloudy...Yes, I used the recommended dose based on the water level. :( I guess i will throw this away...

Rated 5 out of 5 stars
By nina on Oct 29, 2023

Where has this been all these years?!?

This simple step has really made a difference in are quality not to mention filter life, wish i had found it sooner

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

My go-to stuff!

This works SO well. After one use I noticed a huge difference and improvement in my turtle tank. I could never get the water to be perfectly clear until I started using this stuff.

Rated 5 out of 5 stars
By Stefanya on Feb 26, 2023

Sludge Defender works

I have fresh water turtle and he started to have algae issues which is turning water green. I bought this product to help maintain her tank. It keeps water fresh and has helped with algae.

Rated 5 out of 5 stars
By Doriel on Nov 18, 2022


I wish I had known about this magic liquid potion 10 years ago!! No more thick, dense and sludgy water! I can actually see our turtle again! I've been using it for 3 months. Excellent product! Our turtle looks so healthy and happy. If I could give it bonus stars, there would be 5 more.

Rated 5 out of 5 stars
By Missdaisy on Dec 1, 2022

Sludge destroyer

THis stuff seems to work pretty good. I use it whenever I change the filter.

Rated 5 out of 5 stars
By peanuts on Jun 6, 2022

Sludge destroyer

I didn't realize what a good job that sludge destroyer does. It's wonderful. I will be adding this to my auto ship. I did a water change for my turtle tank. All of the sludge was caught up in the filter. Very easy to do water change.

Rated 5 out of 5 stars
By Turtletrio on Jun 22, 2022

Great stuff

Works great. I have 3 painted turtles and this made my tank water look and smell SO much better within about 30 minutes

Rated 5 out of 5 stars
By spindoc55 on Feb 19, 2022

Great product

I am using the sludge destroyer to keep water clear in two tanks with medium sized water turtles. Regular water clarifier wasn't getting the job done, even with good filtration. This product is a simple formulation that keeps the tanks remarkably clear when used every couple of weeks, coupled with good pumps and clearning the filtration every 6-7 days.

Rated 5 out of 5 stars
By turtlemom on Feb 8, 2021

Worked better than I anticipated

I only added this to my tank once but after almost a year of having issues with a cloudy tank within a week after cleaning and/or changing the water completely, my tank has cleared up nicely after using this just once. I'm honestly impressed.