Cheesetian;4611694; said:Might be a bit off topic but at what size will males start developing the bumps on their forehead?
not all male GT get the hump but i have seen them staring at 3-4 inches. i have also seen that they didnt develope untill 6-7 inches if they develope any at all.
as for the topic i have read its best to keep tempatures for GT around 70 -80 ° F (21 - 27 ° C) (referance http://www.petfish.net/kb/entry/393 )