I inherited another tank(48"L x 18"W x 23"tall)I think its a 75gal.Gonna transfer my current LPS reef over to this one.I still got alot to do,I'm gonna have it drilled for twin overflows.Gonna have my buddy cut them out of black acrylic at his job(computer controlled router)so that should save me a bundle plus i can design the overflows to whatever measurement i want.Probably gonna do the closed loop thing too.The only thing i cant decide on is DSB or BB/starboard reef.