I have a 60g cube and I'm running a 20g long for my sump, I have been thinking of adding a refug but i don't want to replace what I have. Can I or has anyone added a hang refug onto the sump externally? I am only running a skimmer at this time, Reason for external is I don't have a lot of room in my stand.
Thanks in advance
David~
Thanks in advance
David~

