Okay, so I've got a 30 gallon tank...and a spare 5-15 gallon filter.
My question is, with a sorority of probably 5-7 females in the 30 gallon, will the smaller filter work?
The filter is well sponged inside and out to provide space for the BB's.
I do have a ridiculous number of air pumps (they are OLD, but still work well), so I can make any number of sponge filters in addition if needed.
My other tanks are 20 gals (1 betta to 10 gals of water and annoyingly large numbers of pond snails...working on getting rid of them....) and I've always used the 15 gal filters in them with no problems...but this is another 10 gals...and a few more fishies.
Just curious, and looking for opinions/more knowledge. :)
Thanks in advance!