This is kinda funny to me cuz I'm a college student and don't have the cash to buy a herpstat nd. Instead I bought a cheap digital one made by hydro farms, it was only $30 and meant for plant heat mats. I hooked it up to my heat tape, taped the probe directly to the heat tape and set it for 94 and it keeps the tape at 94 and the tubs at 91 on the bottom and 93 at the top. Maybe try covering the probe in tape, taping it down to the heat tape? I use electrical tape and i think covering the top of the probe insulates it from the room temp air making more accurate. If that makes sense?
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