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Old 02-14-2005, 09:44 PM   #1
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Can a heater be too powerful for a tank?

Hello,

My heater for a 20gallon tank busted, and all I have is a big 250watt ebo-jagger submerssible heater. My question is, will this be too powerful for a 20g? No matter how powerful a heater, it should just keep it at the set temp. and not be a problem, right?

Thanks.
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Old 02-14-2005, 09:51 PM   #2
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I don't think there is such a thing as too powerful of a heater..

i think since its a 250w it'll be on less of course and I honestly think itll keep the tank more stable than say a 75-100w heater.
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Old 02-14-2005, 10:43 PM   #3
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The only problem with this is if the heater sticks in the "on" position. It will fry the tank very quickly. This is why it's usually recommended to have two smaller heaters rather than one large one. That way, if one sticks "on", you have more time to catch it before it overheats the tank. Other than that, your 250w should be fine. I would probably get a smaller heater when I could though.
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Old 02-14-2005, 11:24 PM   #4
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ok, thanks!
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Old 02-15-2005, 09:26 AM   #5
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I agree with logan. You can use the 250W heater until you can get a 100W heater for the tank. Ebo's are good quality and the chance of the thermostat sticking are low but its still a risk. It would not take long to get the temp in the tank well above 100 with that size heater should it malfunction.
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Old 02-15-2005, 01:03 PM   #6
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Aside from malfunction, heaters will wear faster if they are constantly turning on and off.
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Old 02-15-2005, 02:51 PM   #7
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A 250w heater in a 20g tank will create an expensive batch of bouillabaisse right quick if it ever sticks, like loganj mentioned.
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Old 02-15-2005, 08:46 PM   #8
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I'm with Menagerie - a overlarge heater will be cutting off and on constantly, and will be more likely to break, leading quickly to the bouillabaisse mentioned by Clown Monarch
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Old 02-15-2005, 09:54 PM   #9
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I have a 150W in my 20 gal and I have to keep the heater set at 73F, at 74F it will go to 80F, so I would suggest not putting the large heater on too high. Right now the actual temp is at about 78F.
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Old 02-16-2005, 02:00 PM   #10
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Quote:
I have a 150W in my 20 gal and I have to keep the heater set at 73F, at 74F it will go to 80F
8O You should remedy the situation immediately!
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