Sponge filters for Betta fish. Sponge filters are perfect for betta fish tanks. They provide the beneficial bacteria needed to keep the tank healthy and also promote good gas exchange. You can make a DIY filter or buy one. They work by attaching an air pump with air line tubing and can run 2-3 filters off one air pump. Due to the low water movement in a Betta fish tank you need to pay special attention to cleaning the substrate. Sponge filters are good for most sized tanks whether for primary filtration or as secondary filtration.
Air line tubing.
2 Way Valve.
Jardin Corner filter. (paid link)
Marina Betta heater.
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