I'm strongly considering throwing my pair of 13" Henlei rays in a 300 gallon (roughly 5'x5'x2') Rubbermaid stock tank for the summer. They're currently in a 180 gallon (6'x2'x2') tank now. Since they'll be outside under the covered patio, I plan on covering most of the enclosure to keep evaporation down. Netting will also be in place to keep potential predators out. The thing only costs $200 new. Anyone already have this setup? Thoughts?

