Black DIY Aquarium Filter for 10 Gallons Fish Tank

Increases the oxygen in aquarium and fish tank.

Dense honeycomb shape makes it effective to avoid residue and reduce the death rate of fish.

Tips:

1. Soak the sponge in the aquarium water for 5 mins before use.

2. Always use aquarium water to rinse and clean the sponge. Do not use hot water.

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