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Old 01-06-2006, 12:33 PM   #1
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Temperature fluctuations

Hi all. Most of the regulars here know my tank is relatively new--set it up for cycle in November; have had fish since early December. Although I did a lot of research on certain things, there were certain equipment areas I didn't look into very deeply, such as heaters. As a result, I bought an aquarium kit instead of buying things separately. So I've got a fairly cheap glass heater. Off the top of my head, I can't remember how many watts, but I will look it up and post it when I get home if people want to know.

Anyhow, my question concerns temperature fluctuations. The temp. seems to fluctuate almost 4 degrees at times, which seems like a bit much. I don't think I would normally be overly concerned, but I am heat treating for ich at the moment, so I do not want the temp to drop below 87. It seems to mostly stay around 88-89, but has dropped to 86 at times, and gone as high as 90-91 at times. Both are a bit alarming. I really do not want to go out and buy more equipment at this point unless necessary (although I will likely upgrade somewhere down the road). Does it seem like I have a really crappy heater, or is that much fluctuation pretty normal?

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Old 01-06-2006, 01:53 PM   #2
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typically many of the cheaper heaters thermostats are VERY inaccurate. My old one didn't even say a temp, just had a knob on it that i knew should be "about right". At one point my tank was nearly boiling (exageration) even though i never touched the heater. I think its just the nature of the beast, not much you can do. I would upgrade as soon as possible.

I just bought the kind that are totally submursed 200W and either my thermometer is broke or it doesn't fluctuate at all.
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Old 01-06-2006, 02:10 PM   #3
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I would suggest an upgrade to the Visi-therm heaters Reviewed Here Dependable to a fault.
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Old 01-06-2006, 04:24 PM   #4
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fwiw my temperature fluctuates between 77-81 degrees. i assume that this happens over enough time to not shick the fishes. no one ever seems to be upset, so i figure it's ok.
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