Tanks mates can be anything that can't fit in it's mouth as allready stated. But I see you are looking for larger tanks allready from your other posts. So I'll throw this one out there you're going to need a 10'x4'x30" tank at LEAST for the RCT 5' wide is ideal for long term. so you at lest know what size to look for. Also at this sixe you're better off trying to build your out tank. And that's still going to run around 6k on the low end for a good setup.
Just some stuff to ponder.
Just some stuff to ponder.