Flow behind a background - some questions
I'm in the planning phase of my upcoming 58G (36x18x21) and am currently trying to nail down some of the flow-related details.
I'm planning on using a 3D background (likely Universal Rocks), with canister filter intake behind the background and an approximately 2" grated opening through the background. There will be ~2-2.5" of sand substrate in the main compartment of the tank, with the opening another 2-3" above the substrate to minimize the amount of sand sucked in.
I'm looking to use a circulation pump (currently thinking ~250GPH) behind the background to improve flow from the opening to the filter intake. I will also likely place some additional bagged bio media back there along the path of the water flow, to supplement the two trays' worth of Matrix in the Fluval 306 doing the primary filtering. I'm considering having the return flow through a 2' spray bar at the top of the background, back to front.
Basically, it should look like the attached drawing (view from the back of tank). Would the flow with such a setup be sufficient to clear the detritus in the tank, especially with it being medium to heavily planted? I'm thinking that 250GPH circulator in the back should be sufficient, but open to suggestions. Also, would the spray bar be more effective spraying side to side instead of back to front?
Thanks in advance for any feedback. Would also be very curious to hear from folks with a similar setup.
Last edited by notabob; 07-26-2017 at 01:49 PM.
Reason: Clearer thread title