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Old 11-02-2013, 02:26 PM   #1
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temperature rising?

I can't figure out what is causing my tank to be up to 81F degrees. I thought my heater might be broken so I went out and bought a new Fluval M300. I was using a Aqueon 200 Watt heater. Now my Fluval is a 300W as it says it's good for an 80 gallon tank. My tank is 55 gallons.

I have two thermometers. Ones digital and another is a glass one. Both read the same. I ordered two more new ones today. A new Glass one and a new Digital one. To see if they all four match.

I have the heater fully into the tank. It's sideways that way when I do water changes it will never not be underwater. So what could be the issue? My thermometers could be broken, but both? I thought my LED light strip could be doing it, but the temp is the same at night when they lights are off.
When I do water changes it registers a temp drop, so I don't know what else could be causing my water to be heated so high. My fish don't seem to mind, they are use to it I guess.

I want my tank to be at 76 degrees, but it stays at a 80 to 81 degree temp.
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Old 11-02-2013, 03:20 PM   #2
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Anywhere between 78 and 82 will be fine. Mine runs around 80-81 all year long. Been good for 15+ yrs now.
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Old 11-02-2013, 03:52 PM   #3
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I agree, it's fine! I am sure they are use to that kind of temperature in the wild anyway, but it's just weird that the temp I set it on "76" is not the temp it's at.
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Old 11-02-2013, 04:49 PM   #4
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What will happen is that the heater will raise it to 76 and then the lights will raise it some more. You`ll be OK. Good luck on the tank.
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