So as I was looking at Ken's I like this heater and read lots of good stuff about the,. I am curious if I bought the 300watt for my 30g because its only $5 if it would make my tank to hot. After reading it seems like I put it on a desired temperature and if it gets to hot it will turn of or if it gets to cold it will warm up. Am I reading this right of the site? Also would there be a better choice?
http://www.kensfish.com/fluvaleseriesheaters.html
http://www.kensfish.com/fluvaleseriesheaters.html