grump299
Member
I have started a 3.5g acrylic tank with 1 betta for my wife. It come with a small filer I have packed with floss and media from my established tank for an instant cycle. Can I swap out the filter that come with the tank for a sponge filter and if so what size sponge and air pump should I use thinking of a dyI sponge filter. Thx in advance for the advice