I re-did some of the plumbing and redesigning the sump.
The plumbing was running directly over the sump so I could not get my skimmer in it.
Also the way the main sump is baffled it will not hold a consistant water level. So I will be adding a 10" tall baffle to hold the water level consitant for the skimmer. There is also not refugium space.
So I picked up a 21x22x18 section that I am going to plumb into the left side of the main sump.
I am going to section it off. One side of it is going to be the refugium and the other section is going to be for holding the freshwater for the auto top off.
I added water to the sump first to make sure all the bulkheads were not leaking and the return pump worked. Alls good!