Submersible Heater acting up?

Knight~Ryder · 12-03-2007, 08:33 AM

In my 38 gallon, I have the submersible heater to the very right of the tank set at 26/79. I see the light go on and I'm pretty sure it's working.

I have the thermometer set up to the very left of the tank and it reads 24/76 C, I know it should be 26/79, so should I turn the dial up on the heater so that it might bring up the overall temperature in the tank?

emc7 · 12-03-2007, 08:37 AM

Yes, turn it clockwise just a little bit. Check the temp again in 24 hours. You can also check the temp on the right with another thermometer (like one with a probe for measuring outside temp). A tanks temp will be lower away from the heater, but 3 degrees seems like a lot. If its holding steady at 76, its prob. working properly, just needs to be adjusted. If you ever find a heater is "stuck on", throw it out and buy a new one.

livebearer_love · 12-03-2007, 01:25 PM

Something similiar happens to my tank. The thermometer always ready 6 degrees colder than the thermometer. I figure the thermometer is more accurate and adjust the heater to 70 degrees so that the tank will be 76.
I think you should do same the thermometer would be much more accurate that the digital temperature gauge in the heater.

Obsidian · 12-03-2007, 09:23 PM

Yup, the temp that I have my heaters at is lower than the actual temp in my tank according to my thermometers. Once I got them to the temp I desired they have remained very constant. I had a heater that was too small for my 20 gallon in there and that one created a lot of fluctuation, but I moved it to my 10 gallon and the temp in there never changes unless I change it with my water changes. So find the temp you are comfy with at the thermometer and let it be, if it fluctuates you have a problem, if not you should be fine. It should hold within 2 degrees easy (like from 78-80, NOT from 76-80 with a goal of 78. The tank should not drop below 78 or go above 80. I hope that makes sense). Goodluck!

darkfalz · 12-03-2007, 11:47 PM

The thermostats are only accurate to a few degrees and each heater will be different. For example I had one which I had to set to 22 degrees in order for it to keep temperatuer around 24-26, if I actually put it on 24 temp would be between 26-28. So a thermometer is also handy (also incase the thermostat breaks or changes its range, but bear in mind thermometers also vary in how accurate they are).

Knight~Ryder · 12-04-2007, 09:21 AM

Well it worked. I turned up the dial a few notches and now the thermometer is reading 26.

12-03-2007, 08:33 AM	#1
Knight~Ryder Senior Member Join Date: Dec 2007 Location: Edmonton, Alberta, Canada Age: 26 Posts: 208	Submersible Heater acting up? In my 38 gallon, I have the submersible heater to the very right of the tank set at 26/79. I see the light go on and I'm pretty sure it's working. I have the thermometer set up to the very left of the tank and it reads 24/76 C, I know it should be 26/79, so should I turn the dial up on the heater so that it might bring up the overall temperature in the tank? __________________ -Activated my first freshwater tank Nov 25/07 -Emperor 280 biowheel filter -Visi-Therm 100 Watt Heater -Whisper 60 Air Pump (Tetra) 38G/144.4L {Size 36 x 13 x 20} 9 Cherry Barbs (6 Female, 3 Male) 6 Cardinal Tetra 5 Rummy Nose Tetra 3 Black Skirt Tetra 2 Head and Tail Tetra 2 Otocinclus Affinis suckermouth

12-03-2007, 08:37 AM	#2
emc7 Senior Member Join Date: Jul 2005 Location: Johns Creek, GA Posts: 3,231	Yes, turn it clockwise just a little bit. Check the temp again in 24 hours. You can also check the temp on the right with another thermometer (like one with a probe for measuring outside temp). A tanks temp will be lower away from the heater, but 3 degrees seems like a lot. If its holding steady at 76, its prob. working properly, just needs to be adjusted. If you ever find a heater is "stuck on", throw it out and buy a new one. Last edited by emc7; 12-03-2007 at 08:48 AM.

12-03-2007, 01:25 PM	#3
livebearer_love I luv all freshwater fish Join Date: Nov 2007 Location: Ontario, Canada Posts: 64	Something similiar happens to my tank. The thermometer always ready 6 degrees colder than the thermometer. I figure the thermometer is more accurate and adjust the heater to 70 degrees so that the tank will be 76. I think you should do same the thermometer would be much more accurate that the digital temperature gauge in the heater. __________________ Bowls are for cereal, not for fish!

12-03-2007, 09:23 PM	#4
Obsidian Senior Member Join Date: May 2007 Location: Arizona Age: 37 Posts: 1,039	Yup, the temp that I have my heaters at is lower than the actual temp in my tank according to my thermometers. Once I got them to the temp I desired they have remained very constant. I had a heater that was too small for my 20 gallon in there and that one created a lot of fluctuation, but I moved it to my 10 gallon and the temp in there never changes unless I change it with my water changes. So find the temp you are comfy with at the thermometer and let it be, if it fluctuates you have a problem, if not you should be fine. It should hold within 2 degrees easy (like from 78-80, NOT from 76-80 with a goal of 78. The tank should not drop below 78 or go above 80. I hope that makes sense). Goodluck! __________________ Obsidian 20 gallon 1 Dwarf Gourami; 5 Cherry Barbs; 7 Black Neon Tetras; 3 Peppered Cory's; 1 Albino Bristlenose Pleco (Old Blondie) 10 gallon Breaking it down for storage. 5.5 gallon Betta 100 gallon 7 giant danios; 4 Rosy Barbs, 1 German Blue Ram, 7 Julie Cory cats, 2 Burmese Loaches; 5 Zebra Daios

12-03-2007, 11:47 PM	#5
darkfalz Vishy vishies! Join Date: May 2006 Location: Australia Age: 29 Posts: 481	The thermostats are only accurate to a few degrees and each heater will be different. For example I had one which I had to set to 22 degrees in order for it to keep temperatuer around 24-26, if I actually put it on 24 temp would be between 26-28. So a thermometer is also handy (also incase the thermostat breaks or changes its range, but bear in mind thermometers also vary in how accurate they are). __________________ 40L - 1 opaline gourami 160L planted - 8 harlequin rasboras, 6 tiger barbs, 2 swordtails, 1 bristlenose pleco Last edited by darkfalz; 12-03-2007 at 11:52 PM.

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12-04-2007, 09:21 AM	#6
Knight~Ryder Senior Member Join Date: Dec 2007 Location: Edmonton, Alberta, Canada Age: 26 Posts: 208	Well it worked. I turned up the dial a few notches and now the thermometer is reading 26. __________________ -Activated my first freshwater tank Nov 25/07 -Emperor 280 biowheel filter -Visi-Therm 100 Watt Heater -Whisper 60 Air Pump (Tetra) 38G/144.4L {Size 36 x 13 x 20} 9 Cherry Barbs (6 Female, 3 Male) 6 Cardinal Tetra 5 Rummy Nose Tetra 3 Black Skirt Tetra 2 Head and Tail Tetra 2 Otocinclus Affinis suckermouth

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