Ok, this is the 'new' sump room...granted, not all the equipment is in here yet and I'll not doubt make it messy soon enough, but it is a big improvement over where it started.
The epoxy on the floor has already helped me clean up several spills very conveniently via the shop-vac.
Ok, left to right description of the room:
You can see the return pump along the left wall. It is fed from a 2" pip that connects to the middle 150g rubbermaid stock tank. That middle tank has four 2" bulkheads: 1 to the return pump, one from the corner 150g stock tank (which is going to be my QT tank) and the other two were going to connect to the overflows from the 300g stock tank although I may decide not to use that after all, we'll see.
The return pump goes upstairs, reduces to 1.5" pipe before entering the overflow area of the display tank at which point it hits an 'octopus' which splits the flow into eight 3/4" tubes. Just before it goes between floors though, you'll note a ball valve that connects to a pipe that currently goes to the corner 150g stock tank. I will likely divert some of the flow from the return pump back into the corner 150g tank via this piping.
In front of the middle 150g stock tank is the stand for my custom 95g tank. This will be the 'surgugium'. Basically, it will contain multiple surge devices and double as a refugium. It will dump its contents into the middle 150g and the 300g if I decide to put that up. If I don't end up using the 300g stock tank then I may decide to make this 95g tank into a specimen tank and keep something interesting in there instead. We'll see.
The two 2" drains come down and currently dump into the middle 150g tank. Eventually these will dump into the 95g tank on that wooden stand (and then either surge or overflow into the middle 150g and the 300g stock tanks).
On the right side of the pic is the corner 150g stock tank which will be my long-term QT tank. This will be plumbed into the main system so that I don't have to manage a completely separate system. All water exiting this corner 150g tank flows through a commercial UV system (150w) that is rated to kill basically everything smaller than a human.
I'm still not 100% sure I am comfortable with the concept of relying upon the UV system like that but we'll see. I still plan on using a completely separate QT environment for the first day or two when I'll apply medications and whatnot to corals and do the up close visual inspection for bugs and whatnot...but after that brief time I'll put them in this QT system for six or so weeks. At least, that is the plan.
Once they pass the tests there, I'll either move them to the 300g grow out stock tank or just move them straight up to the display if they are ready.
There will be a single 400w MH lamp above each of the stock tanks (both 150g and the 300g), each lamp will be housed in a lumenarc reflector. I may end up putting two over the 300g and not light the middle 150g...or I may just build a light rail/arm of some sort.
You can make out the end of the UV system in the bottom right corner -- the power supply for it is sitting on top of concrete blocks and the actual device is underneath the corner 150g and extends all the way to the wall. You can see the PVC plumbing (2") that enters the intake of the UV system...and then more 2" PVC that attaches the output from the UV to the middle 150g.
There is about 16" of minimum (at the top of the tubs) between the middle 150g and the corner 150g as well as the return pump stand. There is plenty of space to work there although you certainly can't throw a party there. All the tanks/equipment are off the floor -- all the stock tanks and the return pump (and sump when it gets rebuilt) are on plywood -> concrete blocks -> plywood. I lost too much heat through the floor last year plus, the additional height will make it a ton easier to work inside the tanks. It is the perfect height; any higher and I wouldn't have been able to reach the bottom of the tanks conveniently.
Not really a whole lot more to say about it. I had to reframe the exterior wall which took a lot more work than I expected. I was bored and frustrated with various things by the time I put the greenboard up so I didn't do a very good job and still haven't gotten around to sealing the joints and whatnot...but it is still a heck of a lot better than what had been there before.
I added in a ton of recessed lighting so it is bright everywhere in the room now which is a huge help, especially since the two new beams I installed are so darn big they block most of the light from the previously existing fixture.
I lined the ceiling with 6 mil plastic which seems to be working out just fine so far. I also used some to line the wall by the corner tank -- I'm not sure I'll keep that there but I wanted to at least have a splash guard around the tanks and it seems to be working well so far so I may keep it. I'm just worried about trapping moisture behind the plastic so if I notice that, I'll change plans.