So I'm slowly piecing together a 20 long for a pair of GBRs. I do plan on raising the fry so I need a grow out tank. I know GBRs are highly susceptible to water quality, so I was planning on running the fry tank, or rather a 26 gallon plastic tote, under the main tank with an almost sump-like plumbing setup. I was thinking of using a Fluval 106 canister as the intake from the parents take with the outflow going into the fry tank. From then I'd plumb a return from the fry tank to the parents tank. I'm looking for help on how to plumb and power the return and overall ideas on the setup.