4 years ago #1
thea
Wiz
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I have 3.5 gallons in my 10 gallon tank and have been running my tetra H10 50W submersible heater for 24 hours. It is showing a green light which means the thermostat thinks it has reached the optimal temperature -- but my thermometer says it is 23 degrees (about 73F) -- it claims to keep the temp. 78 +/- 2. What gives?

Is it too small and should I get a bigger heater or it is defective and should I return it to the store? It says it is rated for 2-10 gallon tanks.

How long should it take to raise the temperature anyways (it took over 18 hours)

Answer
4 years ago #2
CoryCloud
Guest

Hmmm...aquarium equipment can be frustrating can't it? Do you have a lid on your aquarium? If not, the heat will evaporate from the water very fast, and that would probably be why. Also, I would suggest filling up the tank more, becuase the more exposed un-heated air, the faster the heat in the water will seep out. Most heaters should take 24 hours at the most. If all else fails, I wouldn't worry if your fish seems healthy; betta can tolerate water 72-80 F although they do prefer 74-78 F.

PS You were that girl with the betta right?
How's he doing?

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4 years ago #3
nexuslite
Champion
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The set temperature heaters are designed for a certain size tank at a certain size room temperature.

My advice would be to return it and order a 50W Aquion adjustable heater from amazon if you can. It will most likely be only $5 more and I use them to run 2.5 gallon tanks and 10 gallon tanks up to 86 degrees.

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4 years ago #4
thea
Wiz
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i was the girl with the betta. Thanks for remembering. He is still in the bowl while I cycle the tank. He is doing much better and darts around every once in a while. I still worry that he likes to sleep near the surface but maybe that's just his thing. He eats only one morsel of food (at most two) but then he's also tiny...

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4 years ago #5
nexuslite
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I have a couple bettas that sleep near the surface. One sleeps in a plant the other sleeps on top of a small filter it makes it easier for them to breath. My male betta only eats 1 or 2 betta pellets also. The females eat tons of them.

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3 years ago #6
Betta boy
Guest

Hi my dad an I set up the heater an hour before we got a Siamese fighting fish,it is in the tank but will it be safe until the water heats up?

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1 year ago #7
BettaBabe
Guest

It is more than normal for bettas to sleep near the surface, don't worry about it! (they breathe with their labyrinth organ, remember? )

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1 year ago #8
Fishy_Gecko
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I got a cheap heater I have never heard of on ebay for $8 it is a 200 watt for a 10 gallon. It is a little big, but it can heat the whole tank in a matter of minutes. It has a red light when it is on, and turns itself on and off according to the temperature. It keeps my tank at a steady 76F. The only problem I have with mine is it is in C and I am used to F so I had to go on google to set it

The box says Oceanaqua. It says it is an automatic heater.

I have had it since the summer and it still works great. I didn't plug it in until it started getting a little cooler though, because the room temperature was 76 or above.

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