The dual-action filters are biological which provides enormous amounts of usable surface area for beneficial bacteria to colonize. this bacteria breaks down harmful waste substances making your aquarium safer for your fish.

Product Details
This fundamental filter is excellent for breeding alltypes of aquarium fish as well as for hatchingand raising brine shrimp as it will not trap or harm them.
Composed of open-celled foam triangular in shape fits up to 25 gal./95 ltr.

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