50% water change a week
two eheim externals and one internal
tank mates are 3 firemouths each half his/her size
My 5 year old watches him but he's the only one he dos'nt hide from
Got him about a week ago
He's probably still settling in, if you only got him one week ago. Did you get the FM at the same time? If they were already in the tank then its likely a pecking order was already in place and the GT feels like the 'new guy' (until he realises he's more aggressive and tougher than the FM's - then you might have trouble depending on the tank size). Which leads onto the next question size of tank?