i have 2 4 ft tanks conected by 2 overflows. 1 tank has fish, live rock and inverts, and the other just has sand, liverock, equipment etc. i was wondering if i could put 1 or 2 cuttlefish in the 2nd tank or would they get too stressed and get butt burn or ink up the system. and if i do get cuttles do i have to get a heater guard.