Heater watts per gallon
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Old 03-19-2013, 12:39 AM   #1
Soup12
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Heater watts per gallon


WHat is general rule for watts per gallon....
I was always told to air on caution by using lower watt heaters just in case they get stuck on it be less likely to fry your fish. I was told around 3 watts per gallon rule.

40 breeder - using 125 watt
55g- using 150 watt
29g- using 100 watt
20g - using 50 watt
etc...

should I use more? I would like efficiency and not to fry tank. I am using iether jagers or finnext titanium heaters with many of them with overheat controllers (safety precaution).
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Old 03-19-2013, 01:00 AM   #2
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A few months ago I was looking at heaters myself. I wound up getting them from foster and smith. Now for the point. I looked at 3 different heaters. And three different manufacturers had 3 different size heaters. My feeling has always to use two heaters at half the wattage each. Then if one sticks closed it's no big deal. If one stays open the other will at least keep the tank from getting too cold. Of course ymmv
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Old 03-19-2013, 01:59 AM   #3
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Yeah, 3-ish isn't a bad idea for probably 10-15 degrees. If the tank is somewhere cold (like a basement) or you have warm-water fish (like discus) you'll want to increase the wattage.

But I agree with splitting it up between a couple heaters if you don't mind the clutter. All heaters will bust, and unfortunately, all too often, they bust in an "on" kind of way. That said, there are better heaters and worse heaters. Consensus is just go with a Jager.
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Old 03-19-2013, 02:10 AM   #4
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If you do use the larger single heater you could always add a second layer of control and protection like a Heater controller. I'm currently looking to add the Finnex Max-300 Digital Aquarium Heater Controller on my aquarium. Never used one before but it can't hurt. I like to error on the side of safety and caution.
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Old 03-19-2013, 10:50 AM   #5
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In my 55's & 75's I run a 200 watt on each end. In my 29 a 150 & 2 300's in my 180. Closer to the intakes, faster the heat distributes.
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Old 03-19-2013, 03:32 PM   #6
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If you go with the two heater idea, which is a good one, make sure you don't over do the wattage. Otherwise the heaters will be going on and off more often, making them wear & tear faster, increasing the chance of failure. I'd get two jagers and aim for 3-4 watts per gallon total. If you add a controller to that, that's even better.
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Old 03-19-2013, 06:59 PM   #7
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Default Heaters

Quote:
Originally Posted by Soup12 View Post
WHat is general rule for watts per gallon....
I was always told to air on caution by using lower watt heaters just in case they get stuck on it be less likely to fry your fish. I was told around 3 watts per gallon rule.

40 breeder - using 125 watt
55g- using 150 watt
29g- using 100 watt
20g - using 50 watt
etc...

should I use more? I would like efficiency and not to fry tank. I am using iether jagers or finnext titanium heaters with many of them with overheat controllers (safety precaution).
Hello Soup...

Your tank will need 5 watts per gallon of tank volume up to 30 gallons. Tanks over 30 gallons will do fine with a heater or heaters at 3 watts per gallon.

The larger tanks will need two heaters placed at opposite ends of the tank for good heat distribution.

This is what I generally do. But this is just one opinion.

B
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