I'm getting a retic very very soon & I can't get my temps correct I have a 5 x 2 x 2 viv & a 250w ahs heater. I've had it one end but temps don't give a good gradient. Should I place one end but back wall or even roof ??

Hi I have a hot basking area of 92f on right side 86f left side(this is across a branch that runs right to left half way up viv.) On the floor its 85f right side 80f left side. Humidity cycle is 80-50 ish thoughout 24 hoiurs. The question The Jamp spends all its time in the hot area 92f. Does...