Upgrade time !

[HaZRaTTy]

Curious if you have your return up into your overflow box? If so did you go with a dual durso? bean animal? If I was you I would go with a herbie.

Also I would consider putting a 1/2 - 3/4 plywood on the back of your stand to save your wall and paint to wherever you're placing your tank. If you do that which I highly suggest you should plumb your pvc against that back wall to save space and have a somewhat cleaner look.

I would place the ball valve somewhere more accessible from under in your sump area might be tough reaching for that in a panic. (its happened)

Also on your drains in your sump the down spout direct it right to the bottom maybe 3'' from the bottom to reduce splash and salt creep.