Weird snake rack problem!

[Beto510]

Hey everyone so I made my own rack a while back it's a six level and I've been using the top three no problem with my herpstat two and temps have been stable for a few months. Now I hooked up my bottom three and the temps are going wacky the top tub hot spot is around 88 degrees while the lower is close to 99-102. My probes on top of my flexwatt in the middle shelf I'm using 3in flexwatt. Has anyone had any issues this? Any help would be appreciated thanks!

[Beto510]

Forgot to mention each shelf has its own strip and they are wired in parallel!

[snakesRkewl]

Try moving the probe to lower shelves and see what temps you get.
If the connections aren't perfect shelf to shelf you will get different readings.
3 inch heat tape has to get very hot to be able to provide any ambient heat to a tub, I only use it for 6qt tubs for this reason.

[Beto510]

Thas the problem I tried moving it lower and the temp on the top just got cooler I feel stuck.