I got my 50 gallon sump about finished (needs scrubbies and drip plate installed yet). I tested it last night and I finally got it to where the sump works. I tried running my 75 "refugium" pumped in the 300 by an XP3 and drained back into the 75 through a 2" overflow (DIY out of PVC conduit fittings) but the sump couldn't keep up because it only has a 1.5" overflow (used bulkhead fittings). If I would have a 1.5" overflow for the 75, would it still not be able to keep up? It doesn't really matter at this point, because I'm just going to pull out the 75 and run Stability in hopes that the ammonia levels will stay down, but I would like to know.
My other question is when I build another sump, does it have to use the same pump and be at the same water level as the current sump? I don't like that the two overflows are side-by-side and that I'll only be able to use one overflow per sump, but I may make a back-up DIY overflow system in case one gets clogged.
FYI, the crappy pump I'm using is a Quiet One 6000 inside the sump. I am probably going to drill my other sump, which is probably going to be a 40 breeder so I can run a better pump externally.

My other question is when I build another sump, does it have to use the same pump and be at the same water level as the current sump? I don't like that the two overflows are side-by-side and that I'll only be able to use one overflow per sump, but I may make a back-up DIY overflow system in case one gets clogged.
FYI, the crappy pump I'm using is a Quiet One 6000 inside the sump. I am probably going to drill my other sump, which is probably going to be a 40 breeder so I can run a better pump externally.
