i recently picked up an RBI CB70 rack with the Iris tubs and I feel like i am punching a lot of holes in them to keep my humidity levels where they should be at. This is the only rack I have so maybe I just don't know any better but if you happen to have one could you maybe post a pic of your tubs or tell me how many holes you poked??
also I use newspaper as a substrate cause its FREE! lol and the temps are around 89-90 hot side and 81-82 cold side
Thanks!!
-Kristine