hi all, im new here, i think i posted in the wrong place before, sorry! ive been keeping tropical fish for a while now and have moved some of them to a bigger tank, opening up my 8g for the betta fish ive always wanted hooray. my tank is pretty much ready, i have silk plants, a cool cave, rocks and gravel, and a heater for my cool little guy ( i havnt got him home yet but hes fab) as well as indian almound leaves and all i need now is a filter. i have an old filter that does 105g/hour but i have been told that this is far too much water flow for bettas so im wondering if there is a basic rule of thumb for filtration flow/hour in an 8g tank please help as i was thinking of making a sponge filter and want to know how big an air pump i need???????