Tom, what type of return are you going to implement from the wet-dry?
I'm finally setting up a 120 (24x48x24) with similar equipment (MH with e-ballasts, wet-dry, CO2 including one of your reactors!).
I'm thinking of a spraybar for a return placed near bottom along back (see below). the return would come over top lip of tank with pvc elbows, go down towards the bottom of tank, and then 'T' into a spraybar with caps on both ends
______________________ top of tank
..............||
..............||
..............|| return going down into a 'T' to the spraybar
..............||
....______||__________
....| ________________| spraybar (capped on both ends)
_______________________bottom of tank
How close to bottom would you place it, or do you like a different type of return
Thanks...Mark