Picked up a 240 6' x 2' x 30". Came with a roughly 30 gallon 36" sump. I'm thinking that is way undersized. What is a good size (I know bigger is better) looking for specific designs/brands that will work in a 60" L x 20" W x 25" H and keep in mind that is maxed out, need some room for other stuff and to get in the sump etc. Aquarium has two 1 1/2" drains and two 1" return bulkheads.