I'm in new territory with a 110XH (48x18x30"h) that I want to filter with an OC 340 and external pump, I could use some help. I'm a pool guy and I'm trying to keep things simple and efficient, but this isn't a pool and I want to be sure I'm not overlooking or oversimplifying anything. My specialties don't really include plumbing, anyway.
The plumbing will consist of a simple hang-over closed loop, the pump then filter and back to tank, nothing else inline. No heater, no reactor/injectors (low tech), no UVS etc. I plan to use numerous ball valves (black/white circles in diagram) and threaded unions (grey rectangles) to isolate components for easy cleaning and disconnect. I want high flow in this tank, so much as to require adjustment down on a ball valve, I don't want to undercut it and wish I had more flow after the fact. This will be a planted tank, not a reef, so I don't want to shoot too high either. All the external pump info I'm reading is pretty confusing. Height from floor to the top of the tank will be approx 6'.
1. How many GPH would you choose to pump this setup considering I want substantial current in the tank?
2. Ocean Clear suggests a pump on the higher end of their suggested range for an OC340 (500-1600gph), what are the downfalls of not doing this?
3. The OC340 has 3/4" connections as do most of the pumps I've looked at, should I maintain 3/4" plumbing throughout?
4. Will PVC flex (where pictured) cause any problems?
5. Do you see anything missing, redundant or wrong in this diagram? Thanks in advance - J
The black triangle is a check valve. Diagram is updated since post#9.