Does anyone use this heater in a 5 gallon tank? I have had it running for a few days &amp; the temp will swing from 80 all the way down to 73 within hours
212327
I have this heater in my Aqueous 8 gallon reef in the return compartment. I've not had any issues with temp fluctuations. I tested the heater first in a container of water for several days. The heater only needed a minor tweak to stay on my target temp of 78. Although the temp spindle is very tight and I felt hard to turn, I think this is to your advantage in maintaining the temperature you want. Due to this fact, it only takes a minute adjustment, not a big twist of the spindle. All in all, I'm very happy with the heater, it's my second purchase, I also have it in my saltwater 10 gal.
1731916
I used mine for a 55 gallon tank and it heated it perfectly until a month later and it stopped producing heat
2007390
It's fine, I use mine in a 55 Gal so you have plenty even if you decide to go to a bigger tank. Enjoy these are the best heaters.
1960199
I have this model heater in a 38 gallon Bow Front Tank and it keeps the temperature right where I want it. I would say the accuracy is a bit off. For me to achieve 75 degrees in the tank I have to set the red marker/bar fully into the 79 range. I haven't tried a larger heater since this is just fine, but maybe a larger heater might not run as long to heat up the water. Mine "does Not" stay "constantly" on with 38 gallons at 75 degrees, it does turn off.
1409126
I have a 750 watt. I live in mid Michigan. I have it on a timer for 12 hours at night. It keeps a open area usually about 2 feet around the heater (pond is less than 3 feet deep there) most days. When its really cold, the circle shrinks. My fish seem to do fine: I have it near the rock pile they hang out in. You could go a higher wattage or just have it run longer. I got it in 2011 I believe so this will be its 3rd winter. good luck
2177968
I sent it back, it didn't work well at all! I tried for several days to adjust the high and low temperature settings, but when then heater was on it wouldn't shutoff and it would overshoot and when it was off, it wouldn't turn back on. I had it in a 10 gallon tank. UL....??
786875
I use it for a five gallon tank and it is great. A one gallon tank might be to small. Prior to getting this I had a flat heater that was under my gravel that auto censored to keep a tank at the right temp. The only problem with it was I needed to have more control of the temp in the. You might try finding it, sorry but I don't remember what kind it was, but I know it was for smaller tanks.
2177338
I have a similar heater. It hangs in the back compartment, no problem. There is no place for it to go. I've had it set up like that for a over a month with no problems. The temp is constant. I wouldn't worry about. Enjoy! The whole family loves the aquarium.
580538
I am assuming your cage will be in your home and provided that your home is maintained at 65 degrees or more, it should do alright for you. I would locate the emitter at one end of the tank and an under tank tape at the other end. Then invest in a Zoo-Med 500 thermostat and plug both emitter and tape into it, then you should have no problems maintaining desired temps. I've been using the emitter in a 40 gallon tote converted into a brooder for chicks and I have been able to maintain 95 degrees no problem, even earlier this spring when it was cooler.
1075815
It does remain stable at around 85'ish, which is pretty warm. If your tank is big enough, I'd suggest an adjustable heater for around $5 more so you can tweak the temperature.
2029240
I have a 2.5 gallon tank and it took my heater more than 2 hours to warm up. I was also concerned that it wasn't working but it warmed up after around 6 hours I would say. It stays at a constant 76-78 now. The red light is never bright unless the room is completely dark so I wouldn't worry about that unless it becomes competly unlit
471108
To add to my previous comment... I finally had to put a 2nd heater in my Fluval Edge 6 gal tank in order to maintain the set temp. The room in which I have my aquarium is on the cooler side and is around 65 F... I really like the design of the Cobalt heater and the ease of setting the temp and am sure that it will work better in warmer months to maintain set temp, but it is unable to keep the tank heated under the circumstances. It does not heat any better than the Fluval 25watt heater that I had been using.
646369
I have this heater in a 3 gallon picotope. It is set to 76F. I haven't watched it for fluctuations, but I have had Endler's Live Bearers in the tank for several months. They are thriving, lots of fry. Hope that helps.
319576
Where do you live? Has it now turned warmer there? One of the last times I used my heater, about a month ago, it only ran for about 15 minutes and then turned itself off. I happen to have a couple small thermometers in my bedroom, so I noticed the temp was warmer than the 68 setting I had the unit turned onto. I did use it a couple times after that in the bathroom which is on a very shady side of the house and the heater worked like normal. So I think it's just smart enough to know when it's not needed. This is just a guess on my part.
53617
I found that the unit is totally unreliable, the heater will not hold its temp,I seen up to an 8 degree variation and lost 2 clutches..I stopped using it..good luck!
1631895
The Aqueon is been unreliable for temp, I bought a Eheim heater and its holding temp well, for a tank your size the 300w should do the trick, rated for up to 250g
1315619
What size is your Tank? Does the red light come on on the heater to show it is on when heating? I have a 75 gal. tank with a 300watt heater and it stays in the middle 70's.