blue tang is easy to keep... just try to get a bigger size and watch their diet will be fine.. they will still eat like a pig even if they have itch.. however powder wont eat if they have itch
bro buy this tank
http://www.sgreefclub.com/forum/index.php?showtopic=53188
really a good deal.. seen this tank myself. Condition 8/10 with 2 Mh which will cost u around $200 or more le..
no problem on 8mm even 6mm is able to support for ur 3ft tank.. 1 point to take note is try not to drop the LR or hit the glass panel with the LR cause it might break the glass..
erm.. since its 28 degree i think there is no problem for ric or yuma... mushroom is also a nice choice for u.. but do take note that u will need to dose some aditicive for it to be stable