Backyard Aquaponics
A place to discuss aquaponics

Hi evilgenius
If you go chift-pist, the idea is to overflow the fishtank to a slightly lower gravel bed for solids removal then auto syphon (or similar) into an even lower sump.
The pump in the sump then takes your filtered water upto the nft tubes and it drains via gravity back into the fishtank.