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Hydor Theo Aquarium Heater

  • Works as its supposed to By TROJAN on 5/8/13

    I have a 50w just for my Q.Tank and have not had any issues with this brand and model so thats what im sticking with till it fails to meet the use.
  • Do not purchase! By Anthony on 5/5/13

    I have had these in the past and they did not perform well. Just recently purchased a 300W unit and after a week, it is sticking on. I like to keep my reef tank warm, but even if I drop the temp towards 70 degrees, the heater kicks on and tries to raise it around 85. I'm running LED's with a Vortech, so not much heat from equipment. House temp is 70 degrees as well.
  • Hit or Miss By Kathy on 3/22/13

    I love this heater, when it works. I have had one that has lasted over 2 years then cracked when I touched the glass one day. Woops, and another that wont turn off. I use that guy to heat my water for water changes. When it does work, it's accurate, and easy to operate. I haven't given up yet.
  • Not accurate By brian on 11/30/12

    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 8/7/12

    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 5/23/12

    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 2/25/12

    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 2/8/12

    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 1/3/12

    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 12/29/11

    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.

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