Can those heaters be good as well?

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Sprinkle

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Mar 21, 2020
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Hi all! ❤

I have found these heaters while looking up at condesation in one.
Cheap 25 watt for my betta tank:


And not so cheap one:


Can 25 watts be as well for my 25-28 L tank? I don’t want to bake and nuke my fighter.
 

Sprinkle

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Room temp is usually 22-24, mostly 23 C I suppose. And what about the heaters?
 

Sprinkle

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I found this Aqua One heater as well:


What do you think about them combined Mr T the loach ?
 

the loach

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Aug 6, 2018
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I don't use heaters anymore, so I have no recommendations....
The problem with those heaters is they work with bimetallic strips which are very unreliable. I think some of them Eheim pro thermo filters have heaters with sensors, they can go a long way.... but of course any electrical component can fail. To prevent overheating you would typically underpower it and get a low wattage heater so it just heats the tank to the required temperature (like for example a max 50 watt heater on a 100 liter tank) and when it fails it would go a couple of degrees higher but it would be impossible or take at the very least several days to reach a dangerous temperature. But since your tank is very small, you would need a 10 watt heater or something, maybe they exist for nano tanks?
 
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