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Old 02-05-2012, 04:25 PM   #1 
Karebear13
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Heater size

I have a 2 gallon tank. I wanted to buy a heater for it. Is 25 watt power okay for a 2 gallon tank. What is the maximum power that is suitable for a 2 gallon, for example could i get a 50 watt or is that too strong?
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Old 02-05-2012, 04:29 PM   #2 
JBosley
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The heater I use for my 2 gal just heats the temperature up by 5 degrees! So as long as my room is around 72 degrees F my tank stays at a nice 77 degrees F
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Old 02-05-2012, 04:34 PM   #3 
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What heater do you use. The temperature of the water stays at about 76 all the time and I would like to keep it at 78-80
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Old 02-05-2012, 04:48 PM   #4 
JBosley
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http://www.petsmart.com/product/inde...ductId=4134008

The 10 watt is what I use! It says it heats it to 7 degrees above room temperature, but I find it's about 5 degrees.
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Old 02-05-2012, 05:22 PM   #5 
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Provided you have an adjustable heater 50w is not too strong. In fact I discourage anything that isn't adjustable as those heaters tend to be very unreliable. My favorite heater for a betta tank is the Fluval 50w. A higher wattage just means it won't have to run as much to keep your tank warm. The one thing you don't want is a lower wattage.
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Old 02-05-2012, 09:31 PM   #6 
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I also have the Marina 10w heater from petsmart for my 2 gallon. It is preset, and claims to heat the tank to 78 degrees F. However, I've found that it only heats the tank to 4 - 5 degrees above room temperature. Unless you keep your home around 76 degrees F, that's not really warm enough for a betta. Remember your water temperature is not the same as the temperature in the room.

I also notice my betta hanging out around the heater more often that he visits other parts of the tank, so it must not be heating it evenly.

It does a decent job overall, but I wouldn't suggest it to anyone else. (Just from my personal experience with it.) Top Fin makes an adjustable 25w you might be interested in. It's suggested for up to 5 gallons, so it should be perfectly fine in a 2 gallon.
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Old 02-06-2012, 03:27 AM   #7 
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awesome thanks guys! I will check out Petsmart tomorrow. I have a 75 watt heater back at home and was wondering if that might be too strong for the two gallon. I have never used a heater so tips would be great thank you
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Old 02-15-2012, 03:37 PM   #8 
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I have a 25 watt adjustable heater in a 1.5 gallon critter keeper and it's fine.
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Old 02-15-2012, 03:49 PM   #9 
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I had a 25W heater in a 2.5g tank, and it was fine. I have heard that larger heaters are OK, will just work faster. You may have size issues, though (if your 2g is <12" and your heater is bigger than that). I currently have an Eheim Jager 50W heater that I got at Pet Club (http://www.amazon.com/EHEIM-Jager-Aq..._petsupplies_2) and it's perfect in my 5gal. There's a 25W version too: http://www.amazon.com/EHEIM-Jager-Aq.../dp/B00425AXQA
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