Recently I upgraded my 2 year BCI to a new vision cage from Big Apple Herp. The Cage is the Pro-Series Acrylic and Plastic Enclosure 50 gallon 48"X18"X13". These cages come with a glass bottom screen top and sliding front doors. Currently I have a 50 gallon UTH on the hot side of the enclosure that keeps a solid temperature around 86-90 and I was thinking that would be enough to keep the cage temperatures satisfied but i am having trouble keeping the cold side up to correct heat. On the cold side I am looking at temperatures around 66-72. I was wondering if this is suitable or if I need to bring those temperatures up. Also If i do need to bring those temperatures up I have another UTH that is much smaller and suitable for a 20 gallon tank. Would it be problematic to place the smaller UTH on the cold side to bring up the general temperature. Any tips comments and thoughts are greatly appreciated! Thanks!