Need A New Heater Recommendation for a 37 gallon

I have one of those aqueon heaters for my 37 gallon. I don't know when it started but the thing isn't accurate at all. I set my temp to 75 and it pushes me up to 80. Anyway, would anybody be able to recommend a decent heater for my 37 gallon tank?

 

What happens if you set it to 70 degrees?

 

I got a finnex HPG 300W for my 55 a while back and has been very accurate it has the temp display on the heater and the nicest feature is yu can adjust the temp on the wire rather than reaching in the tank and trying to turn the temp knob.

I just got my 2nd one for my 29 I plan on moving inside from being an outside tank all summer. I got the 200W HPG series for that tank so i'm hoping I get the same nice accurate results as my 300 has givin me.

 

What happens if you set it to 70 degrees?

I may be wrong about the numbers or remember them but either way I live in a really small place so degrees in my place change pretty fast but , ive actually unplugged the heater let the take go down in temp like 75 , set the heater to 72(so it never goes below that) , plugged it back in and the temp begins to rise.

 

Yes finnex!! Great heaters. Controls out of the water . No more hands in tank .

 

What do you have in your tank that your worried about the tank temp? Are you looking to keep it high for a betta or GBR's? or other warmer water species?

 

I may be wrong about the numbers or remember them but either way I live in a really small place so degrees in my place change pretty fast but , ive actually unplugged the heater let the take go down in temp like 75 , set the heater to 72(so it never goes below that) , plugged it back in and the temp begins to rise.

What is your ambient temperature in the room? Are the lights on?

 

What do you have in your tank that your worried about the tank temp? Are you looking to keep it high for a betta or GBR's? or other warmer water species?

I have a black skirt tank with some corys n such, ive generally been able to manipulate the temperature of the heater some what. but being generally annoyed at the innacuracy of it. a reccomendation on a good one is ideal. I still don't fully understand what the temp is really setting itself at compared to what I set it too

 

What is your ambient temperature in the room? Are the lights on?

the lights in the tank are on, but ive had them mostly on low settings. the temp in my apartment I'm not exactly sure, I should probably invest in a momiter for my room but my a/c says 76 right now. I just turned off the tank lights to test what's goin on. I have my suspicions that the light might be contributing to heat, but I hadn't remembered that until you mentioned it. but usually my temperature goes down to where I would like the heater to be over time when I unplug the it

I have a finnex planted 24/7 lighting system from when I first started and though plants were easy to keep alive. (maybe they are but I suck) I don't run the light in 24/7 mode I have low light pre sets I use

 

the lights in the tank are on, but ive had them mostly on low settings. the temp in my apartment I'm not exactly sure, I should probably invest in a momiter for my room but my a/c says 76 right now. I just turned off the tank lights to test what's goin on. I have my suspicions that the light might be contributing to heat, but I hadn't remembered that until you mentioned it. but usually my temperature goes down to where I would like the heater to be over time when I unplug the it

Well not sure if you have a problem. 76 AC means about 78 in the room where the tank may be located. Lights add about 2-5 degrees. Just sayin'...

 

It’s possible that the heater is working fine and the raised water temps are the result of warmer than usual room temperature plus heat from any aquarium lighting.

 

Well not sure if you have a problem. 76 AC means about 78 in the room where the tank may be located. Lights add about 2-5 degrees. Just sayin'...

yeah you're right but its the unplugging the heater , with all of that in motion the temp still goes down even though the heater is set below the tank's temperature and that's why I'm confused about it. right now the tank is at 78.5 and its not going down even with the heater and lights off so maybe it is my room, but 78 isn't too hot for a community mostly tetras and corys is it? , I'm beginning to think I'm just dumb ...heh. well asside from that I still think the heater mysteriously goes higher than I want it too.

anyway. what other brands of heaters work well for you? ive heard aqueons are known to fail a lot. but that might be biased I don't know

 

It’s possible that the heater is working fine and the raised water temps are the result of warmer than usual room temperature plus heat from any aquarium lighting.

that is possible, and I'm feeling quite dumb. but the heater I still think acts wierd

 

do you have a fan you could run over the surface of your tank to keep the temp a bit lower. 74-77 is usually a comfortable # for a lot of community fish. Or maybe you could turn a ceiling fan on if there is one in the room or even click your AC down a couple degrees.

 

I like the Eheim Jager heaters. They have a temp dial, but also have a calibrate dial. Set the temp on the temp dial, wait for the temp to settle, then set the calibrate dial to the actual settled temp without moving the temp dial. Now set your temp.

Now, to what everyone else is saying. If your room temp is 80°, then your tank will be 80°, no matter how low your heater is set.

If your heater setting dial is inaccurate then you just need to figure out the difference and add or subtract that from the dial setting. Set your heater to a low temp, say maybe 70. Let it settle and check your thermometer. If the thermometer says its 75, then there is a 5° difference, and you just need to set the heater to whatever that difference is.

 

I like the Eheim Jager heaters. They have a temp dial, but also have a calibrate dial. Set the temp on the temp dial, wait for the temp to settle, then set the calibrate dial to the actual settled temp without moving the temp dial. Now set your temp.

Now, to what everyone else is saying. If your room temp is 80°, then your tank will be 80°, no matter how low your heater is set.

If your heater setting dial is inaccurate then you just need to figure out the difference and add or subtract that from the dial setting. Set your heater to a low temp, say maybe 70. Let it settle and check your thermometer. If the thermometer says its 75, then there is a 5° difference, and you just need to set the heater to whatever that difference is.

that's what I'm doing really. just haven't figured out its difference yet. but I do like the idea of what they are saying about heater with temp dials that aren't submerged, and or what mongo said about the jager

 

I just received this Eheim Jager Heater today. I haven't installed it yet because I want to put it in with tomorrow's wc, and do some cable/tube management when I put it in, so I can't give an opinion of it yet, but I did a lot of research and this series comes highly rated.

One thing every review commented on, is these heaters are long. I just measured mine, and it's 12.5" from where the power cable enters the housing to the bottom top. Because of this, I'll be trying to mount mine vertically down near the substrate, after getting it dialed in.

 

well its official. I set my ac really low and turned my tanks heater off. let it get down to 76.5 and I set my heater to 72 then plugged it back in. got distracted but I then cought my tank up at 77.5 . so my heater is definitely a problem. I'm stil not sure how much more it would have gone up though if I didnt stop it

 

well its official. I set my ac really low and turned my tanks heater off. let it get down to 76.5 and I set my heater to 72 then plugged it back in. got distracted but I then cought my tank up at 77.5 . so my heater is definitely a problem. I'm stil not sure how much more it would have gone up though if I didnt stop it

OK, then get a new heater or get a heater controller that it plugs into to control the temperature. You never said what kind of heater you have. Most allow you to re-calibrate the temperature dial. Can yours do that? Looks like it is about 5 degrees off.

 

Have you tried adjusting the knob to 70f, like cichlidude originally asked? Maybe turn the knob to 70f or even 68f and see what happens.

I don't go off what temp the knob points to on the heater. I adjust them up or down until I hit my target temp.

I've got an Aqueon Pro, 2-regular Aqueon's and a Top Fin heater.

None of their adjustment knobs when set to a particular temp match the tank's actual temp.

For example on one of our tanks, if I want it to be at 78f , I would have to adjust the knob to 82-84f.

Once I get it dialed in, it will hold the desired temp steady, even though the knob indicates a different temp.

In my opinion, when a piece of equipment that's fully submersible, has a heating element plus a thermostat costs only $20-$40 retail, I am not going to expect it to be 100% accurate.

I expect it though to hold the water at a certain temp once I figure out where to adjust the knob.

My tanks are kept at a steady 78f, and all the fish are doing well.

 

yeah I already got it to stay around 75-76 by setting the heater to 70/71 a few days ago, think I got it under control, I was worried about temerature changing too much and freaking my fish out. thanks all. I know I'm difficult to get answers from >>

 

I got a finnex HPG 300W for my 55 a while back and has been very accurate it has the temp display on the heater and the nicest feature is yu can adjust the temp on the wire rather than reaching in the tank and trying to turn the temp knob.
https://www.amazon.com/Finnex-HPG-300-Aquarium-Heater/dp/B078W5BT4M/ref=sr_1_8?crid=3ERON185JJN8Y&keywords=finnex+heater&qid=1567041090&s=pet-supplies&sprefix=finnex,pets,146&sr=1-8
I just got my 2nd one for my 29 I plan on moving inside from being an outside tank all summer. I got the 200W HPG series for that tank so i'm hoping I get the same nice accurate results as my 300 has givin me.

Thanks for commenting on the Finnex heater kallililly1973!

I ordered a 200W based on your comment and it arrived today. Best tank heater I’ve seen!

 

Thanks for commenting on the Finnex heater kallililly1973!

I ordered a 200W based on your comment and it arrived today. Best tank heater I’ve seen!

Thanks. I agree. I've had the 300 in my 55 for quite a few months and I like it as well and I also ordered a 200 for when I bring my outside 29 in soon. Best of luck with it... No more wet hands regulating the temp

 

I know this is a few months old, but how did things turn out. I am shopping for heaters and trying to research different brands.

 

I know this is a few months old, but how did things turn out. I am shopping for heaters and trying to research different brands.

2 days before my 6 month warranty ran out my Finnex heater started flashing 66 degrees so I took it out and put my Eheim back in Contacted Fluval and they wanted me to pay shipping to send the heater to their place. Keep in mind this heater is still technically under warranty so I gave em a rash of doodoo and theg still didn't budge so I just chalked it up as a loss and will never buy one again. ( their CS is horrific ) I'll stick to what I know and get the Aqueon Pro's from now on their CS is the best.

 

Thanks

 

My Finnex HPG 100w stopped working after 10 months. The digital display still shows tank temp and I can change the desired temp but it doesn't heat at all, even with the heat light turned on. There's a reason it only has a 6 month warranty. I replaced it with an Aqueon Pro.

One of my Cobalt NeoTherm also malfunctioned but it would click up to a warmer setting every hour or so. I had it set to 78°F and went up to 86°F after a few hours. I dropped it back down to 78°F and it went up to 82°F in a couple of hours so I pulled it. There's a few guys that said unplugging it for 30m should reset it but it didn't work. It has a lifetime warranty so I contacted Cobalt and they asked for pics and they're sending a new unit but it's taking over 2 weeks.

I keep a few spare heaters (I have 15 tanks) so not a huge deal but know that even with lifetime warranties, it still takes time to get a replacement.

 

Best heaters there are. Love them. I’ve had some for 10 years and they can be calibrated if they get off.

 

Best heaters there are. Love them. I’ve had some for 10 years and they can be calibrated if they get off.

That's what I had in my 55 a 200W Eheim and put it back in there and its running the tank fine. The reason I went with the Finnex 300W was I couldn't get my tank to 85 with the Eheim when I suspected a fish had Ick ( which it didn't end up being thankfully ) I currently have a 300WAqueon Pro on hold to swap the Eheim out if it has any issues. I'll stick with Aqueon their reliable and their CS is outstanding from my experience.