Help with cheap filtration on 45L
My business partner picked up a nice lil 45L tank and hand-built pine stand yesterday through the local swap-n-shop paper. He has a 29g already and keeps guppy's - god bless him!
I told him I wanted to set it up for him using some low-tech ideas. I want to do a nice cork-bark background with Xmas or Taiwan moss. Want to do some sort of DIY substrate - maybe kitty litter + gravel?
My first concern tho is filtration for the guppy's... I was thinking it best to do some type under cabinet filtration, but the handmade stand is built exactly for the 45L tank - in other words... long, but not very deep. It has two doors on front, and only a bottom inside, so it has some height under there, jus not the depth to put say a Rubbermaid tub for a sump - so I am a bit constrained.
I wanted to keep as much space in the tank - and with the moss wall - really did not want a HOB filter.
I may could get a tall kitchen trash can under the stand - have not measured it yet. I am a bit confused about a few DIY wet/dry filters I read about that use say a Rio powerhead to pump the inlet water into the filter, then use a sump to return it to say a spray-bar. Can you do this instead of using a overflow box? I need to find a good formula for pump sizing also.
Jus looking for cheap ideas...