So, I've currently got 1.1 balls, looking to get 1.1 more in the near future. The two that I've got are juveniles, probably around 4 months old. Future pair will be similar age or younger.

Obviously I can't do what I've done for my current pair and keep them in glass 10 gallon tanks. Too expensive, too much room, not efficient, etc. I'm going to be building a rack.

The question is, what size should I build? I know they're too small for 41q tubs right now, but should I go ahead and build the big one and fill up the tubs with stuff so they have room to grow, or am I looking too far into the future? Would a 28 q size work fine for a year or two?