Nice setup.
By my count, there are 3 MJ's and 2 SEIO's in there. Is that right? If so, do you have any heat issues from the pumps? Could you provide some detail on your lighting setup, return pumps, etc?
My 75 is setup with 2 x 175 MH's and 2 x 110 VHO, with 2 MJ 1200's and a Via Aqua 2600 as the return pump and I have to run a fan over the sump 24x7 and 1 in the lighting hood when the lights are on. Without the fans, my temp creeps up toward the mid 80's. With the fans, I'm pretty steady at 79.
Just curious...