Temps not stable & keeps fluctuating - The Planted Tank Forum
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post #1 of 17 (permalink) Old 03-31-2013, 03:51 PM Thread Starter
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Temps not stable & keeps fluctuating

I have a 3g pico.

I purchased a 7.5 watt heater from Drs Foster & Smith. The tank doesn't have a lid. With the warmer weather and the heat in my apartment on (that I can't control) it gets quit hot in the apt. So I open the windows. The room cools down but it's not cold yet the water temps drops a lot!

In the am the temps are 80-82 but have dropped in the evening to 72-75.
That's the range between 82-72.

Are there any mini heaters that you can set the temp that would keep the temps stable? Should put plexiglass on top?

I have cherry shrimp and one guppy fry in the tank.
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post #2 of 17 (permalink) Old 03-31-2013, 03:57 PM
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Temps not stable & keeps fluctuating

72 and 82 is a big difference. And the reason why your parameters keep changing is cause you are constantly adding new water do to evaporation


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post #3 of 17 (permalink) Old 03-31-2013, 03:57 PM
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There are loads a mini heaters that are adjustable on eBay. You just need to have a browse and see what size heater will work with your dimensions. They might not be the prettiest of things but they should help maintain a steady temp

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post #4 of 17 (permalink) Old 03-31-2013, 04:00 PM
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Temps not stable & keeps fluctuating

You could probably get one of those XL reptile heating pads even, that's what I did for my old 2.5 in the winter and it kept the water 74F


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post #5 of 17 (permalink) Old 03-31-2013, 04:01 PM
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Quote:
Originally Posted by Stitcher View Post
I have a 3g pico.

I purchased a 7.5 watt heater from Drs Foster & Smith. The tank doesn't have a lid. With the warmer weather and the heat in my apartment on (that I can't control) it gets quit hot in the apt. So I open the windows. The room cools down but it's not cold yet the water temps drops a lot!

In the am the temps are 80-82 but have dropped in the evening to 72-75.
That's the range between 82-72.

Are there any mini heaters that you can set the temp that would keep the temps stable? Should put plexiglass on top?

I have cherry shrimp and one guppy fry in the tank.
The problem is those mini heaters do fluctuate way too much. I was going to use the Aqueon Mini 10w (suggested by Aqueon for their Evolves) and I returned it for an Aqueon 50w adjustable glass heater. Temp does not fluctuate at all, unless you call between 80.4 and 80.8 fluctuating.

The smallest I saw was Tetra had a fairly compact 30w glass heater, I think it is adjustable. It is about 1/2 to 2/3 the size of my Aqueon one.

But I have never seen one of those mini or slim heaters that people did not complain they fluctuate or eventually break.

On the petco site, they sell some brand, I think Hydro or something along those lines that are suppose to be a little better than the Aqueons.


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post #6 of 17 (permalink) Old 03-31-2013, 04:04 PM Thread Starter
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I check the water contantly throughout the day and before and after adding water. It's not from adding water. I'm very careful to add same temp water. It's because my apt temps are not stable.

I will check eBay for heaters.

I don't want to add a lid but if I must I will.

Thanks
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post #7 of 17 (permalink) Old 03-31-2013, 04:06 PM
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Temps not stable & keeps fluctuating

Here's the heater I have in my DBP 3 gallon, and it's an on off heater, goes on when its too cold and off when it's too hot,

http://www.amazon.com/Marina-C10-Compact-Heater-10-Watt/dp/B003TLWWOO/ref=sr_1_1?ie=UTF8&qid=1364745874&sr=8-1&keywords=Marina++heater


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post #8 of 17 (permalink) Old 03-31-2013, 04:10 PM
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I also use that heater in my spec. Maintains a steady temp

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post #9 of 17 (permalink) Old 03-31-2013, 04:14 PM
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Quote:
Originally Posted by DefStatic View Post
The problem is those mini heaters do fluctuate way too much. I was going to use the Aqueon Mini 10w (suggested by Aqueon for their Evolves) and I returned it for an Aqueon 50w adjustable glass heater. Temp does not fluctuate at all, unless you call between 80.4 and 80.8 fluctuating.

The smallest I saw was Tetra had a fairly compact 30w glass heater, I think it is adjustable. It is about 1/2 to 2/3 the size of my Aqueon one.

But I have never seen one of those mini or slim heaters that people did not complain they fluctuate or eventually break.
Huh? Really? I can't speak to the aqueon, but I've used the marineland equivalent (10w heater) in many pico/nano tanks, and they have ALWAYS performed reliable. As long as you don't mind the 78 degree preset, you're good to go.
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post #10 of 17 (permalink) Old 03-31-2013, 04:21 PM
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Keep in mind, smaller volumes of water have a harder time keeping a steady temp. Also, I would try putting the lid on for a couple days and see what the results are. Evaporation is a great way to cool down.
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post #11 of 17 (permalink) Old 03-31-2013, 04:22 PM Thread Starter
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I have always used Marineland Visi-Therm heater. They've been reliable on my larger tanks. I have a 50w but I think thats too much. Maybe the 25w would work?
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post #12 of 17 (permalink) Old 03-31-2013, 04:27 PM
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Huh? Really? I can't speak to the aqueon, but I've used the marineland equivalent (10w heater) in many pico/nano tanks, and they have ALWAYS performed reliable. As long as you don't mind the 78 degree preset, you're good to go.
Just went by what I read about various non-adjustable mini heaters.

Also, it matters where your tank is. At my office, so far the temps rarely fluctuate. And I have no experience with anything smaller than a 4 gal.


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post #13 of 17 (permalink) Old 03-31-2013, 04:40 PM
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I can say from personal experience, the 10w preset thermostatic heaters work great on 3 gal tanks. 78 degrees also is a suitable temp for both RCS and guppies.
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post #14 of 17 (permalink) Old 03-31-2013, 05:11 PM Thread Starter
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I ordered the 10w Aqueon mini heater from amazon for $15.23.

I just need to figure out what to do in the meantime.

I guess I will try keeping the room temps stable.
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post #15 of 17 (permalink) Old 03-31-2013, 05:39 PM
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I ordered the 10w Aqueon mini heater from amazon for $15.23.

I just need to figure out what to do in the meantime.

I guess I will try keeping the room temps stable.
If you didn't want to wait, Petco and Petsmart has those for only $17.

That was the same one I was going to use. I just opted not to because I have a larger tank and could fit the 50w Aqueon in it, although at nearly twice the price. Plus I needed to stay closer to 80 without much fluctuation.


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