basic exodon questions

[pnoydlyte]

I was wondering how many exos would be the bare minimum to keep them in and would a 30 gallon be ok for that amount? would 7 be ok for a small school?

 

[channarox]

30g will be very cramped although exodons dont seem to mind IME.
best to have more than 10.
although less can be done.
you could probably fit 12 in there.
they will usually only hit 3 inches.