I have a Acrylic sump I used on my 180 tank but haven't used for awhile as I upgraded to rubbermaid stock tank. It is at least 30 gallon but could be more. Has three bulkheads drilled into as used to have an external skimmer hooked to it. Don't know who manufactured it but is a professional sump has a few compartments built in for additional uses. Looking to sell it for $35 or will trade for a few frags or something like that. Just don't want to store it.