"rr" means reef ready This is so you can pipe your wet dry filter up underneath your stand and not have to have a overflow box or filter sticking on the top of your tank. I am laocated in Lakeland, between orlando and tampa on interstate 4.
It is a regular shape 48" long 18" wide and 24" high it is a drilled tank. It is in Perfect shape. If you email me your email address to pmancuso1@tampabay.rr.com I will email you pics.
thanks Peter