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post #1 of 6 Old 06-07-2010, 07:52 AM Thread Starter
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heater for a small tank

I have a tiny 2.5 gallon tank. I have a small heater by Tetra that I buried under the gravel. It works fine, but there is no way of regulating the temperature. So if I leave it on all the time, my water goes up to 85. It's a pain having to remember to turn it on at night when the house cools down, and turning it off when it warms up during the day. And Im sure the temperature fluctuations aren't healthy.

Can anyone recommend a small heater that can be set to maintain a constant temperature, that won't take up a huge amount of space, since my tank is so small?
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post #2 of 6 Old 06-07-2010, 08:38 AM
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wow 85 huh? i am curious is the tank near direct sunlight or a heat source? a small heater should not have the ability to raise it that much.. also (just plain curiosity why bury it in the sand? i would imagine that the sensors that regulate its own on / off function would not work properly with no flow... i had a similar heater in a 1.5 gallon with no issues that is the only reason i ask...
the tetra heaters keep water at +/- 3 degrees of room temp and have an internal auto on off feature

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post #3 of 6 Old 06-07-2010, 08:49 AM Thread Starter
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Originally Posted by bearwithfish View Post
wow 85 huh? i am curious is the tank near direct sunlight or a heat source? a small heater should not have the ability to raise it that much.. also (just plain curiosity why bury it in the sand? i would imagine that the sensors that regulate its own on / off function would not work properly with no flow... i had a similar heater in a 1.5 gallon with no issues that is the only reason i ask...
the tetra heaters keep water at +/- 3 degrees of room temp and have an internal auto on off feature

Sorry I was incorrect. It's not a Tetra heater, it's by Hydor. Here is a link: http://www.petco.com/product/102429/...0Heater-102429

It's meant to bury under the gravel, I remember reading that in the instructions. I don't see any sensors to speak of, which may be part of the problem. Oh and no, it's not near any direct source of heat like an appliance or heating vent. In fact, it raised the tank up to about 82 degrees overnight when I have the ac in the house set to 73 degrees. During the day I usually have the AC set to about 75 or 76, so this is heating up the water closer to 8 or 9 degrees above room temp.

Do you happen to have a link to the heater you used in your 1.5 gallon tank?
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post #4 of 6 Old 06-07-2010, 08:54 AM
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ashhh that is not the heater i had LOL my mistake also... her is the link http://www.walmart.com/ip/Tetra-Subm...#ProductDetail i love it and its super cheep great for a small tank!!!

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post #5 of 6 Old 06-07-2010, 09:12 AM Thread Starter
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ashhh that is not the heater i had LOL my mistake also... her is the link http://www.walmart.com/ip/Tetra-Subm...#ProductDetail i love it and its super cheep great for a small tank!!!

Oh wow, I was looking at that heater the other day. Seemed kind of large for a 2.5 gallon tank. I supposed I can just suction it to the top of the glass and lay it horizontally. I think if I tried to put it vertically, it would stick out the top .

Thanks for the info!

MK
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post #6 of 6 Old 06-07-2010, 09:17 AM
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any time.. again i have used this for 1.5 upto 10 gallons and it works really nice and holds a good temp... good luck let me know how things turn out for you

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