25w marina heater: does not have temp dial/numbers
Expensive heater comparable to some and does not have a numbered temperture dialed. Therefore, no way of setting temp.
Need to guess and go through lots of temperture changes until the theremomator read required temperture, takes around 3 weeks.
This heater is unreliable and should not be used. It is not recommended.
It is a matter of guessing which is unsatisfactory.