I like the suggestions you have gotten so far. I understand your point about the table and frag tanks, but you could still slightly elevate the sump and make that work. Would at least make it easier to siphon all of the water out of it if/when you need to do that. But if you are going to leave the tank on the floor, I would at least put some rigid insulation under and maybe around it to create a thermal break.
I have a basement sump, and the other thing I would recommend is putting ball valves on at least the return so that when you have to do something at the sump that requires you to shut down the return pump you can keep the DT from draining back to the sump. You can kill two birds with one stone and use true union ball valves. I also have them on my drain lines, figured since I was putting unions in I might as well spend the extra and go with ball valves. I don't think I've ever actually shut those off though - just the return valve.
Only other thing I see compared to my setup: Are you planning to run reverse schedule lighting over a fuge? Thoughts about how you would mount the lights?
I like the idea of a ball valve on the return pump, I'll do that
I am planning on running a reverse schedule for the fuge. Hadn't quite figured out what to do about hanging the light yet. May just hang off long rope from the ceiling
Would love a rolermat, but not in the budget yet. I am only spending money on the hobby that I get from selling frags or other reef related stuff, so am limited on what I can do. Eventually though. I was able to pay for the 125 gallon tank, return pump, skimmer, live rock, plumbing, and fuge lighting with money strictly from the hobby and still had enough left over to go to a couple of frag swaps. Hoping that I'll be able to keep selling more and more frags to keep growing my hobby.
Another reason to get it off the floor, even if only by a couple feet, is to reduce the head pressure. In any case, you are going to need quite a substantial return pump to get much flow up to the display.
I was worried at first about the head height, and settled on the DCP-18000 pump, which is rated for 30' of head. I have about 12' of vertical height, total of 18' of pipe including the vertical climb and (5) 90's and (2) 45's all in 1" sch40 pipe. I'm not sure what sort of flow I can expect to get out of it with that set up, but if I can get 2X or more turnover I'll be happy.
It's a good point about head pressure. Did you need some confirmation of your target return flow, piping size, pump selection, etc, or is that all worked out? In my case, I wanted about 1200gph for return flow rate, and had to use 1.5" pipe to push that up from my basement. Some DC pumps don't do too well with high head pressure, but maybe you've covered all that already ...
Would be nice to get a second opinion on expected flowrate. I have a DCP-18000 pump, which is rated for 30' of head. I have about 12' of vertical height, total of 18' of pipe including the vertical climb and (5) 90's and (2) 45's all in 1" sch40 pipe. I'm not sure what sort of flow I can expect to get out of it with that set up, but if I can get 300gph or more I'll be happy.
I built a simply box for my skimmer and socks on the same table as my frag tank. It empties into a 100 gallon fuge tote on the ground...as does the frag tank.
I would attach the pvc securely to the wall!
I have been trying to think of a good way to secure the PVC form the return line. I didn't want to drill any holes in the wall because I just put 8 coats of dryloc, primer, and paint on the wall to help mitigate water seapage and don't want to compromise that with drill holes. The drain lines are held in place by the bulkheads at the sump, and in the holes in the floor above. The return currently is mounted at the outlet of the pump and will be mounted to the frame of the display tank on the floor above. Would be nice to have a way to mount somewhere in the middle for more support.
Thanks all for the replies! getting some valuable input!