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Romania
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Review on MTMTOOL Aquarium Biochemical Breeding Diameter by Stacy Duncan

Revainrating 5 out of 5

Suitable for Betta On filter accessory

These are handy little filters. I wasn't sure if they contained charcoal or not. They work well but it would be nice to understand their composition and durability with some guidance. I cleaned the sponges by removing them and washing them in a 10% bleach solution, then rinsing thoroughly. My bettas didn't bother them at all.

Pros
  • 🐟The sponge filter uses an air pump as a power source to improve the dissolved oxygen level in the water.
Cons
  • The list will be long.