Hydor THEO Heater

0 of 0 people found the following review helpful:

Excellent!

Not too shabby! by DONALD CAMPBELL

Experience Level: Intermediate

Posted on 3/17/2010 from LOCKPORT, NY UNITED STATES

Comments: I was very happy with this heater for the fact that the features are true. First its durability, as i had dropped it twice on the floor right out of the box(I'm a butter finger). Not to mention that it IS accurate Within -/+1 degree. I definitely recommend this heater. Yes, I would recommend this product to my friends.

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0 of 0 people found the following review helpful:

Below Average

Always use a temp controller by MIKE GOLDSMITH

Experience Level: Expert

Posted on 1/30/2010 from JACKSON, NJ

Comments: I don't care if you have a heater made by space aliens a million years ahead of us....use a temperature controller with your heaters, no matter what type of heater you employ! Yes, I would recommend this product to my friends.

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0 of 0 people found the following review helpful:

Excellent!

Excellent! by Peter

Experience Level: Expert

Posted on 1/21/2010 from Chicago, IL

Comments: Very nice heater. I've been using this brand for awhile and it works very well. I really like how durable it is. Very good quality. Temperature is accurate. Yes, I would recommend this product to my friends.

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1 of 1 people found the following review helpful:

Below Average

50 WATT hard to set by DENISE B

Experience Level: Intermediate

Posted on 12/4/2009 from SAINT LOUIS, MO UNITED STATES

Comments: I bought the 50 watt Theo for my 6 gallon freshwater tank. I had to turn the dial down to 71 degrees to get it to shut off after it heated my water to 79 degrees. It's been running for 3 days with the dial at 71 and the water maintaining a temp of 78 to 78.5 degrees. However after reading all the reviews about the the heater sticking on and frying their tanks I will be replacing this one for safety. I would not recommend this product to my friends.

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5 of 5 people found the following review helpful:

Unsatisfactory

Complete Junk by JOEL SAXTON

Experience Level: Intermediate

Posted on 9/26/2009 from VENICE, CA UNITED STATES

Comments: Don't waste your money on this piece of junk. It is totally inaccurate (on the order of about 10 degrees fahrenheit) as several unsatisfied customers have noted here. Hydor should be ashamed of themselves for selling second rate products which have surely destroyed many an aquarium. I would not recommend this product to my friends.

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4 of 5 people found the following review helpful:

Unsatisfactory

200W Theo Not Accurate by JOEL COLLETTI

Experience Level: Expert

Posted on 9/21/2009 from MONTARA, CA UNITED STATES

Comments: Ordered the D&D Salt Mix kit that included Refractometer and 200W Theo Heater 6.6kilos of D&D salt and Coral Vue digital thermometer.... The 200w heater was off by more then 3 degrees when using the Coral Vue digitial Thermometer and then using my personal digital high end wireless temperature thermometer; and the Theo heater did not shut off. I called them because the Refractometer was giving me false readings when calibrated with lab tested .35 ppm solution, so I told them about the heater too. They replaced it with the same device that, again did not shut off and was off at every point on the adjustment knob except at the 79 degree mark which sometime went to 80 before shutting off. I own a Theo 400 watt heater that hasn't given me any trouble, but the 200w batch must be off. I've read other reviews that mirror these sediments, but wrote them off, a bit, because I did not need the heater anyway, I just bought the kit for the salt and Refractometer. Little did I know that item was going to give me trouble too. I can't say enough good things about this store, as their customer service is superior in the trades, but some of the shipping methods and products have given me trouble over the years. You can buy from them with confidence that if there is a problem, they'll take care of you, but you may have to do some legwork. I think, for the most part, reviewers are accurate in their comments and I would stay away from this heater unless you're mixing salts, and don't care about the accuracy of the device. This has been my honest experience. I would not recommend this product to my friends.

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3 of 3 people found the following review helpful:

Unsatisfactory

Awful control by BARRY CASTLE

Experience Level: Intermediate

Posted on 8/21/2009 from DALLAS, GA UNITED STATES

Comments: My Theo heater was purchased to heat my 100 gallon container of newly made up saltwater.Thankfully, I didn't put it in any of my tanks, because with the thermostat set on 79, it heated my water to 92.9 degrees. It was NOT stuck on. At that temperature, reducing the thermostat one click turns the heater off... verifiable thanks to the lighted "on" indicator. When I removed the heater, the temp dropped to between 76-77 degrees with the pump running. I would steer clear of this heater unless you want to risk nuking your tank. I would not recommend this product to my friends.

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5 of 5 people found the following review helpful:

Unsatisfactory

INACCURATE!!!!!!!!! by STEPHEN DEAN

Experience Level: Expert

Posted on 5/29/2009 from FLOWERY BRANCH, GA UNITED STAT

Comments: I have three different models of hydor theos, unfortunately! One is in my 30 gallon, one in my five gallon, and a 400 watt in my 110 gallon (All are saltwater tanks). To say that the temp. gauge is inaccurate is a understatement. I have had my 400 watt heater set at 72 degrees and the tank temp is actually just over 81 degress and it is still turning on! This is verified by an electronic therm., 2 floating glass therm., and a "slightly" inaccurate LCD stick-on therm. All heaters in all tanks are not even close to accurate according to the temp gauges. I had to take the first 400 watt I got back to the store b/c when it was turned way down on the dial, it still was heating the tank to 86 degrees! Love your fish and corals and get something more reliable please for your own sanity peace of mind. I have been through four different Hydor Theo heaters in three different models, they just are not accurate or safe for your animals! They look nice but what does that matter when your animals are dead? I would not recommend this product to my friends.

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2 of 2 people found the following review helpful:

Average

Good by Jeff

Experience Level: Intermediate

Posted on 5/10/2009

Comments: Seems to keep the temperature up. It's temperature indicator isn't accurate when compared to the tanks temperature. I would not recommend this product to my friends.

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8 of 8 people found the following review helpful:

Unsatisfactory

Garbage by JOHN NARDUCCI

Experience Level: Intermediate

Posted on 3/27/2009 from OCEANSIDE, CA UNITED STATES

Comments: First one I bought did not work. Hydor's response was that my thermometer was bad and not the heater. Second one worked for a little over a month and then I woke up this morning to find it went on last night and never shut off tank temp is 88 degrees farenheit. Heater was set for 79 and never shut off. I would not recommend this product to my friends.

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0 of 0 people found the following review helpful:

Excellent!

Perfect Heater for Nano Tank by SCOTT KINSEL

Experience Level: Beginner

Posted on 3/15/2009 from AUSTIN, TX UNITED STATES

Comments: I needed a compact heater for use in a crowded chamber three of my biocube. This heater is perfect. Very easy to use and sturdy. Yes, I would recommend this product to my friends.

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17 of 17 people found the following review helpful:

Unsatisfactory

Terribly Unreliable by NICHOLAS LOWRY

Experience Level: Intermediate

Posted on 1/30/2009 from MINNEAPOLIS, MN UNITED STATES

Comments: I bought two of the 400 watt versions, received and installed them exactly one week ago, and one of them exploded while I was at work and flipped the breaker. We'll see what choosing this product costs me in coral in the next few days... I would not recommend this product to my friends.

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0 of 0 people found the following review helpful:

Great

Great little heater by Keith

Experience Level: Expert

Posted on 8/15/2008 from EAST HADDAM, CT UNITED STATES

Comments: I use two of these in my 54 gallon tank. They work great especially for the limited space I have to put them. Yes, I would recommend this product to my friends.

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2 of 2 people found the following review helpful:

Excellent!

AWESOME HEATER! by DC_reef

Experience Level: Beginner

Posted on 3/24/2008 from NJ

Comments: I bought a Jager heater for my 12g Nano Cube because the brand seemed to get a lot of praise. However, it was not fully submersible which was a huge inconvenience...the power cord was a pain! And the temperature seemed to constantly bounce (+/-) 2 degrees! I bought the Hydor Theo 50-Watt and it's really SPECTACULAR! When I opened the box I was surprised by how small it was...and so far I've had it for a few days and the temperature only fluctuates at most about (+/-) .2 degrees! I'm also able to fully submerse it horizontally so it's more hidden from view. I highly recommend it. Yes, I would recommend this product to my friends.

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10 of 12 people found the following review helpful:

Great

Compact by MAXIMO HADDAD SPRECA

Experience Level: Intermediate

Posted on 12/11/2007 from MEXICO, MEXICO

Comments: It is the little heater that could. I have a small 5 compartment Betta tank (Aprox 4 Gal.) and it does its job fine. I only gave it 4 stars because the temperature scale is not very accurate, specially at 80+ temperatures. However, once set, it holds a very steady temperature. I recommendo users to guage temperature settings with an external thermometer to establish the right temperature. Yes, I would recommend this product to my friends.

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1 of 1 people found the following review helpful:

Excellent!

Theo heater by Maggie3fan

Experience Level: Expert

Posted on 12/3/2007 from CORVALLIS, OR UNITED STATES

Comments: Having this one heater replaces 2 other 300 watt heater and keeps the water just as warm Yes, I would recommend this product to my friends.

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7 of 8 people found the following review helpful:

Excellent!

Small and smart by Timanator

Experience Level: Intermediate

Posted on 11/30/2007 from HOUSTON, TX UNITED STATES

Comments: I received the Hydor Theo 50 watt heater and it has worked wonderfully in my 17.5 Gallon Nano tank. The material and craftsmanship is absolutely top notch. This is the total throw it in, set the temp and forget about it heater. Yes, I would recommend this product to my friends.

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4 of 4 people found the following review helpful:

Unsatisfactory

If I could give zero stars... by Joriki

Experience Level: Intermediate

Posted on 11/25/2007

Comments: My tank is currently 77.7 degrees according to my two internal thermometers - one in sump and one in overflow. I have verified this with a thermipen, my most accurate and an $80 temp reader. After realizing that my pair of Hydors were overheating my (thankfully) new and just curing tank to 83 degrees when set to 78, I set both of them to 74. One of them is on right now! You can't maintain 74 degrees by adding heat to 77.7 degree water! I read somewhere that these were good heaters - not true from my experience. Maybe I got 2 duds, but these are terribly innacurate. I would not recommend this product to my friends.

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6 of 6 people found the following review helpful:

Unsatisfactory

Short-lived fire hazard by Jimmie

Experience Level: Intermediate

Posted on 11/1/2007 from COLUMBUS, OH

Comments: I've had about eight of these heaters ranging from the 50 watt to the 300 watt. Last night, the second of these shattered and broke in my reef tank at 1AM. Two others I use in my RO/DI water tanks have managed to weld their thermostats in the on position, heating the water well past the 90's. That's 50% failure so far. Do yourself a favor and pass these up. I'll be buying titanium heaters for use with a controller from now on. I would not recommend this product to my friends.

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1 of 1 people found the following review helpful:

Great

Good stuff by JORGE SANJINES

Experience Level: Intermediate

Posted on 10/10/2007 from WILMINGTON, DE UNITED STATES

Comments: Worked very well, just as advertised. Thanks Yes, I would recommend this product to my friends.

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2 of 2 people found the following review helpful:

Excellent!

Great Heater by MARK WUESTENBERG

Comments: This is absolutey a great five star heater and I will never buy another kind of heater. I bought mine at Pets Mart and paid $45 I kid you not. Yes, I would recommend this product to my friends.

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1 of 1 people found the following review helpful:

Excellent!

overall fantastic heater by kiel friedt

Comments: i ordered 2 of these heaters and have had outstanding heat over all. Even with 600 ghp moving in and out it keeps it at 78 and no more. It does move, but only .2 up or down prefect heaters. Yes, I would recommend this product to my friends.

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5 of 5 people found the following review helpful:

Excellent!

Solid Heater by RICHARD CULLEN

Comments: I have two of these and they work wonderfully. Very accurate will not break easily like normal glass will not leak current into water in event of a short (getting plug wet) like titanium heaters. Yes, I would recommend this product to my friends.

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0 of 1 people found the following review helpful:

Average

Watch it daily. by Mark Wuestenberg

Comments: When the water is already warm I have notice this heater will still come on, which I unplug on warm and hot days for a safeguard. Yes, I would recommend this product to my friends.

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8 of 8 people found the following review helpful:

Unsatisfactory

Dead fish by ROBERT CAMPBELL

Comments: After 3 weeks one of the 300 watt units on my 125 gallon saltwater tank lost control and turned itself on. Period. On. Next morning the tank was about 100 degrees. Ice saved some fish, all else died. I would not recommend this product to my friends.

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4 of 4 people found the following review helpful:

Unsatisfactory

2 MO. OLD HEATER STUCK ON by JAMES FITE

Comments: If you want to cook fish, this heater is for you. I have had trouble with some of the Jager as well, so on to the next brand. Jeesh! I would not recommend this product to my friends.

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2 of 2 people found the following review helpful:

Below Average

Unreliable by Injoynit

Comments: I purchased this heater after my old one went bad and after 3 months this ones themostat gave out overheating my tank! Yes, I would recommend this product to my friends.

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