Hi, glad you posted, I'm trying to figure this out too. Don't want probe in tank, and I don't like idea of taping it sandwiched between glass and tank. I picture the heat from the pad loosening the tape, and the probe not working, pad getting too hot. Same possibly (in my mind) if taped to bottom of pad. Another user (in another thread, I don't remember who) suggested using a piece of foam under length of tank, and cutting a channel for the probe to rest in, snug against bottom of uth pad. I'm gonna try this. Craft store has cheap foam boards in different size depths.