03-02-2013, 11:55 AM
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Originally Posted by JDM
True. I look at it that if I need to have two heaters, one will be in the tank and one will be out of the tank. There was someone here who did two canister filters and two inline heaters. For me two canisters on a 37 gallon is WAY overkill but that is a proper backup setup.
The two inlines would work as primary and backup for each other, or even primary and auxiliary, but if you turn off just the filter or it fails, you have zero heat. The in tank at least gives you a proper fully standalone backup, not a system dependent backup.
were the OP's tank mine, I would have 2 canisters on it and so one heater on each would make more sense. Anything over 50 gallons gets 2 canisters.
Turning off a filter is not going to make a difference with the temperature of the tank, for the reasons anyone turns off a filter. The only time I turn off filters is when I change the water, during which I also turned off the heaters (though my tanks have been unheated for years now). I understand the concern about the filter breaking - but that's a pretty rare occurrence with canisters. Too, larger tanks take a while to lose heat. having a traditional heater on hand would be a good idea if both inlines are on the same filter, in order to be prepared for anything.