great heater for the price By boxxmann on 12/3/2014
boxxmann would recommend this product to a friend
I purchased this heater to heat my reef tank because I recently switched from MH lights to Led lights and lost my heat source. I haven't has any issues with it, though, it is a bit long. I just put it in the front cornet of my 92 gallon corner tank directly beside the Hydor Koralia 1150 I also purchased, so the PH can move around the warm water in the tank. My thermometer is on the other side of the tank and is always reading 78, which is what the heater is set to. It is a very good heater and works well for my application.
Best Glass Heater Made By FirstContact on 11/10/2014
FirstContact would recommend this product to a friend
This is the best glass heater manufactured. Period.
waste of time By peter on 11/8/2014
peter wouldn't recommend this product to a friend
Got one overheated, set to 65 hits 90 degrees. Second one has a 4degree drop from set point temp before heater works during the day time.. Yes it goes to 79.2 heater goes off, and the heater will only go on at 75.2 consistently. Thats a 4 degree or more swing in a warm 75 degree home. Total waste of my time. One bad thats part of life but 2 bad= total waste of time... Why bother with the calibration it doesnt work. Mine was off by 5 degrees can only adj for 2, wow thats fantastically usles(gimmick) just set it to the accurate thermometer no matter the dials readings. Then remember the temp differences. But its real hard to turn the temp control, like herculean.
Works great, very tall though By frost0fractal on 9/17/2014
frost0fractal would recommend this product to a friend
Be sure before ordering to check the dimensions, these are very tall heaters. The 200W model barely fit in the highest chamber of my 55 gallon sump. Otherwise they work great.
The best and most annoying, all in one heater By Daniel on 9/17/2014
Daniel would recommend this product to a friend
These heaters have very sturdy construction, great heating, large range, and easy calibration. The only problem is the temperature dial is extremely hard to change and the calibration out-of-the-box is wildly different from unit to unit. If you plan to crank it up to max and let your controller do the work, it's a sure-buy. If you plan to use the internal thermostat, you need to do some tinkering and would probably be better served by a different heater.
Best Heater EVER! By Powder Kat on 8/17/2014
Powder Kat would recommend this product to a friend
There is no better heater that EHEIM. Excellent construction (German) and keeps absolutely accurate temperature. Never had a temp swing. I've purchased every heater out there and none hold temp for more than 6 months. I use the old junk ones to heat my water for changes. I put the Eheim in the tank and never touch it. Keeps perfect temp.
Not the best option By Anna on 8/4/2014
Anna wouldn't recommend this product to a friend
I bought 300W version of this heater and I can't understand why it is rated to heat up up to 250 gallons when it can't keep up with my 120 gallons tank. The temperature does not go above 75. I have to add more heaters to keep my temperature steady,
Total freakin' crap! By Michael on 6/14/2014
Michael wouldn't recommend this product to a friend
I cannot fathom why people think these things are worth anything. I have two differrent sizes of this heater and both have the same problem. They can't heat for crap! If I leave the window in the room open, I wake up to a 70° tank. That goes for both of them, even though they are both connected to aquacontrollers! That's right, folks! The big one in my 150 is connected to my apex, and the little one in my 16 is connected to my Reef Keeper, and they BOTH can't keep up with an open freakin' window!! Are you kidding me? A $20 off the rack heater from a big box pet store is better than these pieces of crap. Maybe I was unlucky enough to get two different lemons, but it's more likely that they are just garbage.
Best Heaters By Tom F on 5/5/2014
Tom F would recommend this product to a friend
These are simply the best heaters you can get at these prices. They are very reliable, have protection circuit and priced well enough to get redundant ones to ensure the tank never gets too cold.
Good heater over all By Stephane on 5/1/2014
Stephane would recommend this product to a friend
At first i was looking forward to getting this heater. I loved the fact that i can 'calibrate it'. however, the instructions are ok, but i find lacks details. I sometimes have a hard time readjusting the heater. The red ring still confuses me and im still unsure if it actually does anything. At one point i was trying to adjust it over 4 days. i got really frustrated with it and was considering getting an 'old school' heater. But, i manage to understand it enough to set it.
as for the quality itself... it's solid! very well made and you can see they did spend time making a quality product. I just wished that. It's very consisted with temperature. I use both a tape thermometer and digital and there are no temp swings. my Digital reports 80.1 consistently when ever i check.
Stable By David on 4/22/2014
David would recommend this product to a friend
Does exactly what you want from a heater. Provides consistent temp with no temp swing i can tell.
Works well By Rafael on 4/8/2014
Rafael would recommend this product to a friend
No complaints seems reliable