Can I use a heater meant for a larger tank? - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 6 Old 01-04-2014, 07:23 PM Thread Starter
Can I use a heater meant for a larger tank?

Picked up an Eheim Jager heater for my 45 gal. I bought the 150W which I just realized is rated for 53-79 gal. tanks. The store didnt have the 125W I apparently should have bought. Can I still use it? I would imagine the heater will still cycle as it should. No?
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post #2 of 6 Old 01-04-2014, 07:27 PM
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Shouldn't be a problem. I would set it lower than what you want to test it out first. In other words, if you want it set for 78, set it to 75 and see if it reaches 78.

It's not like you went really crazy out of scope. You should be fine.

Animal testing is a terrible idea; they get all nervous and give the wrong answers.
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post #3 of 6 Old 01-04-2014, 08:10 PM Thread Starter
Glad to hear! I figured It would be fine. Im just surprised how different the ratings are for the Jagers over all other heaters. My previous heaters were 200W where in this case I need a 125W Jager.
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post #4 of 6 Old 01-22-2014, 11:26 AM
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Yeah, 150 vs 125 is fine. You wouldn't want to use something much larger for the tank in case of heater malfunction.

I like to use two slightly underrated heaters.. If one overheats the tank should be fine, and if one dies, the other will be able to keep up with heating for a bit.
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post #5 of 6 Old 01-22-2014, 02:49 PM Thread Starter
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Originally Posted by jennesque View Post
Yeah, 150 vs 125 is fine. You wouldn't want to use something much larger for the tank in case of heater malfunction.

I like to use two slightly underrated heaters.. If one overheats the tank should be fine, and if one dies, the other will be able to keep up with heating for a bit.
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Yeah the heaters been working great. Temps been steady and the heaters really nice looking as well.
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post #6 of 6 Old 01-22-2014, 04:38 PM
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Glad to hear it
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Animal testing is a terrible idea; they get all nervous and give the wrong answers.
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