Who Gives A Fish Forums

If you're using a sponge filter, don't forget to get an air pump with adjustable flow. That way you can tweak it if the bubbles are too much for your fish.

Yeah, and if the sponge filter's too weak, you can always upgrade later. Better to start gentle and adjust as needed.

Remember to monitor water parameters closely during the first few weeks. New filters can sometimes cause mini cycles if not properly established.