Hey all.

Ive only just joined and already i'm picking your brains!

Can anyone give me any advice on the best Internal filters to have
running in my tank?
I've currently got 2 fluval *3 pumps going,one at either end of a 4
foot tank,as well as an air pump creating a bubble wall.

The problem is that my Swordtails are throwing out babies at an
alarming rate. In the 6 weeks since i got them there have been 25
new babies born!!

Im having to change the sponge filters every 2 days as there is so
much waste coming fronm the fish now.

Any help would be great thanks!