I purchased a used RSR 250 and the original owner took outstanding care of this tank. He did not get the sump option though. I really need someone to talk me out of adding one. What are my options here? The main need is I do want to have a refugium, I have always had one since keeping tanks. Am I going to be able to buy the plumbing kit to add this? I am not seeing much looking on google on where to buy something like that. The original RSR 250 sump kits look hard to find and when I do find one they have no stock. Crystal Reef Aquatics made one that fit but I hear they went out of business.