I believe it's rated for a 75g tank, but I've used it on a 90 and a 110 tall (since they're the same footprint it worked fine). I have the other side of the union valve ($30 new) and some additional plumbing, may be able to work out a price to include a pump as well (I'll have to see what's laying around).
Asking $40 for the sump as it is (with the complete union valve).
Asking $40 for the sump as it is (with the complete union valve).