Not accurate By brian on 11/30/2012
brian would recommend this product to a friend
Temp adjustment is not accurate in the least bit, but what heater is. I've used these for year never had a problem with them but then again I run them on a controller. I would'nt go with this heater unless you use one also.
good heater for the money By Brandon on 8/7/2012
Brandon would recommend this product to a friend
this heater is obviously not the best but it works. I've had it running for about 6 months now and it still works just fine. the numbers on the dial are a little off but once I played with it enough, I got it right where i needed it. Tank runs between 78 and 80. I will probably buy another for a back up and water changes.
No good, like most inexpensive heaters By Dale on 5/23/2012
Dale wouldn't recommend this product to a friend
Got 4 of these in various wattages (100 & 150) to replace some Finnex heaters that stopped working. They are compact but are very erratic, quite often sticking on. (The Finnex heaters stuck off-a little safer I'd say). Would not get again or recommend.
ok By Jason on 2/25/2012
Jason wouldn't recommend this product to a friend
its a good heater for the price but when you live stock is worth so much more go and get a higher grade heater.
Good Heater By JP on 2/8/2012
JP would recommend this product to a friend
I purchased this heater about a year ago, and it has been an all-around good heater for the money. I would recommend this heater to anyone looking for a budget heater that is extremely reliable.
Not my favorite By reeftank85 on 1/2/2012
reeftank85 wouldn't recommend this product to a friend
I tried a couple of these 300 watt heaters, and was not that impressed. The markings on the dial are not off by several degrees. It doesnt stay consistent through the year. I keep my tank around 77 and in the summer the tank will get closer to 80, yet the heater will still kick on periodically. I plan on getting a tank controller soon and not have to worry about it though,
Not reliable By Brent on 12/28/2011
Brent wouldn't recommend this product to a friend
These heaters are not accurately calibrated in my experience, which includes 3 sizes of this model. Turned all the way down (71) they heat the water to about 78 without the lights on.
Great! By Zach on 11/8/2011
Zach would recommend this product to a friend
Looks great! Works great!
Don't waste your time By Weave on 11/4/2011
Weave wouldn't recommend this product to a friend
I bought the 300watt for my 90g reef about a year ago. Noticed my chiller coming on alot even when we had the windows open. Looked at heater and it was on. I tried to turn it back and it just stopped doing anything. always stayed on. Thank god for the chiller or would of had a fish fry for dinner. Works good for short period of time then crapped out. Don't buy.
Hydor Theo Heater - Value for money By Sunny on 8/30/2011
Sunny would recommend this product to a friend
I have the 200Watt heater in my 65 gallon tall aquarium. I have had this heater for around 3 years now and it had been working great. It maintains my tank temperatures really well even in Winter. My aquarium is in the main hall which has alot of windows, being from the north east this room does get very cold in winter, never had any issues with this heater not being able to keep up. It is good value for money and would recommend it to anyone.
Cheap and built that way! By Sarmo on 5/28/2011
Sarmo wouldn't recommend this product to a friend
I had 3 300 watts THEO's. One broke, poisoned and and nearly killed my reef tank. a second one is set at 71 degrees and stays on until 79degrees. i have swithced brands and will NEVER buy another THEO!
Great Heater, it will "shatter" however if impacted. By Loknar28 on 12/6/2010
Loknar28 would recommend this product to a friend
I had a couple of these and they worked great until one of them got to friendly with some live rock in my sump. Although I believe they indicate that it is "shatter resistant" you still need to be careful about placement in your sump as they will break if impacted. They are however laminated so the glass should stay together and not circulate though your system.