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Product Reviews
5493 reviews on 1118 products!

ProductsTemperature ControlHeaters
Hydor THEO
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Product Description:
Hydor THEOThe first shatter-proof heater thanks to the peculiar glass tube.

Maximum security: : THEO is shock resistant thanks to the PTC heating element and the shatterproof glass tube.

Free positioning in aquarium with supplied suction cups.

Self-limiting: : the patented PTC heating system guarantees operation in complete safety because in case of dry running there is no danger for damage.
Product Specifications:
25W - 400W sizes
User Ratings: (33 reviews)
Overall: 5.42
Value/Cost: 5.48
Effectiveness: 4.79
Quality: 4.85
Ease of use: 6.58
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Found: 33 reviews Page  1 2 - View all
joejoe has used this product for 3-12 Months.
Overall Rating: 8.75/10 November 14, 2005
"Great Heater"
Hydor always makes great products and this is another one of them. One nice thing about it is that it does not use a standard heat coil but seperate heating zones to disperse the heat better. Another intresting thing to prove the quality is that you can plug this thing in outside of water and it does not crack. Any other heater would. In fact you can let it get as hot as it gets and plunge it in a bucket of ice water and it will no phase it. If you can not find this heater All Glass Aquarium just released their heater and it is the same exact heater but sold under the AGA name.
Limvostov has used this product for 1-3 Months.
Overall Rating: 9.5/10 October 12, 2005
"Solid heater ... steady temperature"
I have been using this heater for about 2 months so far and it has been doing a great job on keeping the tank at a steady temperature of 78F. However, I am using the 400W heater on a 29g tank in a lab kept at 71F at all times, so I would be really upset if it could not keep the temp steady.

Being able to submerge the heater is kinda nice but since the temp setting dial is on the heater you have to get your arm wet to change it if it is fully submerged. Not really convenient in the lab.
Kinguni has used this product for 1-3 Years.
Overall Rating: 5.25/10 October 11, 2005
"Good heater, but runs too warm"
I've used 2 of these heaters, one being 175 watts and the other 100 watts and both kept my tanks warmer than I liked, even at their lowest settings. I ended up selling the 175 watt one to a fellow fish keeper who had tanks he kept warmer.

If it could keep an accurate temperature, it would be good, but keeping the tank at 82 isn't good for a lot of fish.
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Ratings are submitted by Cichlid-Forum users based upon their own subjective views and do not necessarily reflect the opinions of Cichlid-Forum.com. CF disclaims any responsibility for the accuracy of information contained in reviews submitted by users, or for any damage or liability arising from the content of any review appearing on Cichlid-Forum.com. All product information on this site, including descriptions and specifications, is based soley on information made available by manufacturers. CF disclaims any responsibility for this information or the products listed. Product information may be inaccurate and is subject to change without notice. You should confirm all information before relying on it by contacting either the manufacturer or vendor with any questions about the products or the information presented.

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