Hey everyone, OK so ive had my rack for about 1 1/2 months and for the life of me i cant get steady temps in all four tubs, i try and use the same about of substrate in each tub pretty much the same stuff in each tub trying to keep them all the same, thinking the temps would be the same right, NOT i cant get that to happen does anyone else have this problem its killin me here. Sorry its just frustrating like no other