hygger Small Aquarium Bio Sponge Filter Mini Fish Tank Filter for Breeding Fry Betta Shrimp Tank 2-5 Gallon (Small)

How does a bio sponge filter work?

Attached a sponge filter to a 3/16 inch airline to an air pump, constant flow of air bubbles rise up from the top and out into fish tank.

Dirty water be sucked into small fish filter through chink, fine sponge traps fish waste, decaying plants and other debris, while bio balls provide plenty space areas for the colony of beneficial bacteia to thrive and grow, and finally push clean water out of the top of the filter. Thanks to both mechanial and biological filtrations, this small yet efficient filter filtered out sparkly clean water. At the meantime, it agitates water surface with constant bubbles.

• For better performance, it is better to use with a powerhead or water pump to blow up debris to filter. It helps to cleaning the tank faster.
• If you found bubbles loud, use a less powerful air pump instead. It can reduce the sound of bubbles.
• The suction depends on the air pump you use. The small output air pump, the weak suction.

PS: airline and air pump are sold seperately.

Features:

1. Mini Compact design, can be hide behind rocks/driftwoods or other decoration
2. Mechanical and biological filtration to help keep water clear
3. Safe for fish, won't get sucked up
4. Bubbles agitate water gently won't disturb your pet
5. Easy to set up & clean, simply install an airline to air pump
6. Quiet, it is depends entirely on the pump that drives it
7. Great for betta tank, shrimp tank, quarantine tank or fry tank
8. Fresh and saltwater aquarium applicable

Perfect for Tiny Fragile Aquatic Creatures

If you are looking for a tank filter that would not suck the tiny fry into filter and don't have a heavy load of debris in the water, then this is it.

Bio filter with gentle water flow is great for fragile invertebrates, such as fry fish, betta, guppy, shrimp and tetras.

• Size S, measures: 1.8”W x 5.4”H, for 2-5 gallon tank
• Size L, measures: 3”W x 7.3”H, for 6-20 gallon tank

Below image shows you how to set up filter step by step.