Hi thanks. I do have a gradient from 90-92 hot end to about 70 cool end sometimes slightly less depending on the weather but have recently changed from a viv system to a rack so i think was just panicking about changes. Im glad i did this post because i have had some good feedback about not stressing so much about temps, obviously they are important but again if you have sensible gradient thats more important.
You have to be careful anything below 75 is unhealthy and could lead to issues.