Are you attaching the probe from the 500r to the side of your tank to regulate an UTH (you talk about it falling off even with tape)? The temp probe for the 500r should go between the UTH and the tank, that way it is regulating the temperature of the UTH not trying to regulate the ambient temp, which is what it would be trying to measure if the probe is attached to the side of the tank.
There ar lots of folks here who really seem to think the 500r is a good product at a good price. I'm sorry that your experience seems to be otherwise.
Reply With Quote