Eheim Jager Aquarium Heater

“Many people recommend Eheim Jager heaters as among the most reliable, so that's what I use as well. They are a little on the long side but it's otherwise been fine with me.”

“Eheim are notoriously hard to calibrate. I just got my second or third one and it took me 12 days to finally be able to make it work, and it’s off 3 degrees. That’s the best I could do.”

“I bought two jagers when I set up my last tank about a year ago. The thermostat failed within a few weeks on both of them. Couldn't get any response from eheim to get them replaced.”

“I have Jager and VisiTherm heaters and have had a single issue with a VisiTherm heater that suddenly stopped heating after only one year; and have other heaters that are more than 10 years.”

“Well the Eheim is working fine. Set at 79 temp reads 78.8. Just will not consider it for my main display tank since the glass is very reflective and distracts during viewing.”

“I have eheim jager and am not happy with it at all. The temperature keeps oscillating between 75 and 78. It's my first eheim, and I did not have this problem before”

“I use them on all my larger tanks and they have worked for a long time and are still running at a consistent temp. My one complaint is that it does not adjust to the temp you move it too”

“I've had my Eheim Jaggers for years on 4 of my tanks. They are my favorite trusted heaters. Bought a few used (very old) and they are still going strong, never see a fluctuation in temperature.”

“Once long ago Jager was tops, IMO the newer ones are not so. I have three new models that do the same as the two post above. All three of mine run out of calibration range so that feature is worthless”

“The Jager's are big so they won't fit in all tanks and are not super accurate but seem to last the longest. I have never had one cook a tank yet.”

“If you are set on getting a cheaper more basic heater look at Eheim Jager. I have a 150w and it works well, they are quite big when compared to other heaters though.”

“One of mine is off 8 degrees. Ehiem jager heaters when set work in 2°f intervals. So mine turns on when it hits 76 and turns off at 78. Ignore the numbers on the dial. They don't match up most the time.”

“I have 6 of the eheim jager heaters and they are all calibrated wrong. 4 of them were like this straight out of the box and and 2 seemed to happen over time.”

“I have the 300W in my 75 gallon. This was my bad when I bought it, but I didn’t realize the thing was like 8 ft. (slight exaggeration) long. Anyway, it’s been resting on the substrate without issue since I put it in the tank.”

“I use Jager heaters (Eheim associated company - German made 4 me) and they work great and have a 3 year warranty. Their tank size ratings are accurate as they can heat a tank they say they can with ease.”

“I have the Jäger as well and they are pretty good. I use them on a controller though so I don't solely depend on the inner workings of the heater to maintain temp. The only complaint I have are the directions on how to set the desired temp.”

“I have had this heater a little over a week now and it was accurate to a t up until this morning. I woke up to my tank @ 85degrees when I have it set on 79.”

“I replaced the Fluval with my old Eheim jager, to test it also. It took 3 minutes to increase temperature by 0,3 Celcius. Now I know my old heater is fine.”

“The Jägers(eheim) are my favorite I have 5 of them currently running as well as 5 of my old ones (15 years old) that all still work perfectly for some reason I have never had one kill my fish or fail in any way.”

“Eek I just bought a Jager for the 5g. I hope it lasts longer than the Hyggar 50w I got in January that fried my fish.”

“the new Jagers use different (chinese) thermostats frrom what I understand which seem to be less reliable. The old ones are definitely bulletproof though!”

“I currently have two 300w eheim jager heaters that have been in service about 7 months now and just noticed both of them have water/condensation on the inside of the tube around the top part of the heater.”

“I actually use an eheim jagger 300w for my 210 with the inkbird controller in the sump. Works awesome. I have another one (200 I think) in my 75”

“The 75 watt fit but didn't keep a stable temp. The 75 watt EJ works just fine in my Nuvo 14.”