Eheim Thermocontrol e100 Heater

Sweet heater for my saltwater tank. The fish are still alive after 2 months. I read about the old version that had some sort of silly calibration nonsense where you gotta turn knobs and be like a scientist to figure it out, and get a temperature gauge thingy. Ain't nobody got time for that. Just buy this thing, it's dope AF so far.

Accurate! Consistent! What more could you ask for!

I bought this to replace a cheaper brand that came as part of a kit. This heater is way way nicer. The temperature has been spot on and is very steady, even with changing indoor air temperatures.

After ordering and trying 3 other name brand submersible heaters, I'm glad I chose this one. So far it's working perfectly to keep my baby turtle comfortable in his new home.

After 4 months use heater would not turn off. On lowest setting 68 deg. my 50 gal. aquarium reached 82 deg. and heater remained on. Emailed Eheim customer support three times over the past two weeks and received no response with the exception of an email confirming receipt. This heater may be a fluke but regardless I will not buy another Eheim product based on their lack of customer service.Update: I finally got around to calling customer support and immediately they sent out a replacement. So Eheim is back in my good graces. Bottom line: Call don't email if you have an issue with one of their products.

Keeps almost perfect temp! with no calibration!!!!I have these in various sizes in 3 of my tanks and I would never use anything else!

Seems to work well so far. I deducted a star because it was missing a suction cup.

Love this heater! High quality feel and packaging right out of the box! Very stable temperature control. Set it and forget it. Thanks Eheim!