I have a 60 gallon cube with a 20 gallon high sump underneath. I'm looking to add on a refugium in a separate tank next to sump. Space is limited but I think a 5 gallon glass tank would fit. I've drilled tanks before but can you drill a tank this small and put in bulkheads? Or I was thinking a custom acrylic. Where can I get a custom acrylic tank made or the supplies to do it myself? Thanks