I agree anything is better than the 500r it is junk. It just clicks on 100% then off hot cold. It might be great in an aquarium but anything with a flat bottom it heats up too fast mine swung from over 124º to 88º then back up again. Experience, bought one set up enclosure brought snake home worry worry bought herpstat and wondered why the heck I bought the 500r in the first place. Not buying a proportional thermostat and buying the 500r just makes the better one cost 30 dollars more.






