Ok, flow rate question...
I'm creating a fluidized sand bed filter that will be directly fed by my two drains, then flow into my sump.
My return pump is rated at 900gph, but with head loss should be about 650-ish gph. After the T-off to my sump, this would be about 460-ish gph into the bucket. What size drain do I need from the bucket in order to keep up with the drains?