Originally Posted by crs1945
It's a 29gal standard,live plants,and 9 platys ( at this time ).
I would go with a sponge filter. Either a simple sponge like the Elite dual sponge connected to an air pump, or one of the Fluval internal filters that is basically a sponge with a small motor head.
I have the latter on my 33g (though it is an old Eheim model that is sadly not made any longer) and on my 29g I have the Elite dual sponge connected to an air pump which also runs an Elite sponge filter in my 20g (dual) and 10g (single).