Eheim Jager Aquarium Thermostat Heater, 150- watt

I'm not sure if this heater is too small for my tank (Waterbox 50.3) or its just not that good. I have it set to 83 (highest setting) and it only gets to 77.6 tops. Its not even a month old. I am going to save it for a backup and buy a 200 watt of another brand.

Eheim Jager heaters are the best. I've have used these heaters for years. And never had a problem.

I am told these are high quality thermometers. I bought 3. They are not heating ronthe set temperature. I have tried to calibrate the temperature and that is not working out either. The temperature set and the actual reading in the tank are always two different values. I would not buy eheim thermometer again.

So I came down this morning to my aquarium very warm. This heater was heating still, even above the already too warm temp. So I unplugged it, turned it down, and now it's not working at all. Very disappointed with this product

If you need a heater Asap, this is not the one for you. This is the second one I own, and setup is a pain. You need to calibrate and adjust it to your desired temp in a 5 gallon bucket with a thermometer and something to circulate water, or you risk killing the fish in your tank. Out of the box it looks like the temp is set at 77 degrees. Actual temp of the water after mine stabilized was 83 degrees. The True Temp indicator only moves 4 degrees left or right on the 150 watt model, and is hard to move. The Blue temperature dial is just as hard to turn and requires 2 hands to adjust. And once you get it into your Aquarium, expect to have to adjust the blue dial again to reach your target temp. If you need a heater Asap, this is not the one for you. This is the second one I own, and setup is a pain. You need to calibrate and adjust it to your desired temp in a 5 gallon bucket with a thermometer and something to circulate water, or you risk killing the fish in your tank. Out of the box it looks like the temp is set at 77 degrees. Actual temp of the water after mine stabilized was 83 degrees. The True Temp indicator only moves 4 degrees left or right on the 150 watt model, and is hard to move. The Blue temperature dial is just as hard to turn and requires 2 hands to adjust. And once you get it into your Aquarium, expect to have to adjust the blue dial again to reach your target temp. Why buy this ?? Because once you do have it set to your target temp, it will do a great job at keeping it there within 1 degree. … more

When I originally receive this product is was shattered due to the carelessness of whomever delivered my packages. But after a short phone call and a brief explanation of what happened a new one was sent to me right away. I just set it up in my 60 gallon tank and within just a few hours it has perfectly warmed my tank to 73. I definitely recommend! Also a big thanks to Chewys customer service!!

Bought this for a 20 gallon tank thinking it would be too much and I would just turn it down low. Wrong!!!! Every day I have had it I have had to turn it up more. 3 days & still not to the temp that it is set to. Many degrees off. Don't know if it is defective or if I did something wrong but it just isn't working right.

Fast shipping. Have not installed this one yet. The heater was purchased as an extra in case I have one to go out. However, I have always purchased quality when I purchased an Eheim.

I used this brand years ago, until they redesigned them to have dial out of the water.I stopped using it at that point. Fast forward to now, it's all submerged again, & it's still very accurate and reliable.

This heater is perfect for whatever use. It is very adjustable, which his great for what I need it. Most heaters go to 72 or 76 only. It has a little light so you know it's working, and so far I'm quite happy with it. The price was great too. thanks!