I have an acrylic eshops wet dry sump that is empty but for center divider. (I was going to do one half refug, throw a sponge or whatnot into the opening at bottom, and return pump other side.
I'm not sure how many gallons it is, I want to say it's more 20-25g but I'd have to check. But it's acrylic and cheap if you didnt want a cheap glass 30g from anywhere.
