Hello I have had this Acantho for 5 days now (4 but will become 5 in a few hours), it has been eating well I have fed it pellets. During the day he expands fully on his right side but doesn't cover his skeleton all the way on his left side. Is this normal? His left side flesh seems to be "levitating". Also he is against the glass so he touches the glass and he also touches a bit of a rock but doesn't expand there, could that be a problem to him not fully extending? He is in a low flow area of the tank and receives low light.