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Product Reviews
5493 reviews on 1118 products!

ProductsTemperature ControlHeaters
Hagen Thermal Pre-Set Heaters
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Product Description:
Hagen Thermal Pre-Set HeatersMaintaining a consistently correct temperature is important to the health of your aquarium fish. If your fish require a heater, a Hagen Thermal Pre-Set Heater is the answer. They're equipped with a rotary temperature set dial, waterproof seal, pilot light and a ceramic heater core for even heat. Strong suction cups hold heater securely on to aquarium wall. Choose from several wattages to accommodate aquariums of all sizes. Includes a manufacturer's one-year warranty.
Product Specifications:
50Watt, 10.5"; 100Watt, 10.5"; 150 Watt, 12.5"; 200 Watt, 12.5"; 300 Watt, 13.5" .
User Ratings: (16 reviews)
Overall: 7.53
Value/Cost: 7.06
Effectiveness: 8.63
Quality: 6.63
Ease of use: 7.81
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Found: 16 reviews Page  2 - View all
MightyM has used this product for 1-3 Years.
Overall Rating: 5.5/10 August 31, 2007
"die on me in the coldest month."
paid over $40 for the heater to find out it died in less than 2 years.
kennyman has used this product for 1-3 Years.
Overall Rating: 6.5/10 January 10, 2007
I have 3 of these left out of 5. I dont believe they are truely submersible but they dont fit right sticking up out of the tank either. They are cheep enough and keep the tanks warm but leak after a while.
has used this product for 3 Years or More.
Overall Rating: 8.5/10 July 11, 2006
"9 years and counting"
The 150 watt does a very good job at keeping a consistent water temperature in my 35 gal. The suction cups on the holder have become hard and decayed after a few years. The only complaint I have is the temperature setting is inaccurate and a separate thermometer is required. 9+ years and still going.
danferd2002 has used this product for 3-12 Months.
Overall Rating: 9/10 May 21, 2005
I have the 200w version on my 45 gal. it stays at a constant 80 degrees. Its a set and forget kind of heater.
JG has used this product for 1-3 Years.
Overall Rating: 8.5/10 January 3, 2005
"Definitely a Solid Mid-Range Heater!"
After moving back to Canada and jumping back into the hobby, I decided to go with this brand as it had a reasonable retail price and seemed sturdy. I've used the 150 watt heaters in my 42 gallon tanks without a glitch. EJ's are good, but I wouldn't short change this heater.
Phtstrat has used this product for 1-3 Months.
Overall Rating: 7.5/10 December 6, 2004
"Decent, So Far"
I have 2 300w in my 125 pygocentrus tank. So far they've kept it above 80 most of the time, which is what I need.
haveman has used this product for 1-3 Years.
Overall Rating: 5/10 March 27, 2004
"Why bother?"
I had a 150W as support in my 55gal show tank and it failed - it was 2.5 years old - lost all of my 3-4 year old Peacocks/Mbuna.
As bad as that sounds I gave my brother in law another 150W for his 29gal that was less than 2 years old. We didn't talk for three weeks after my catastrophe and forgot about it and .... thats right - more fish soup.
EJ's RULE !!!
RiftnReef has used this product for 0-1 Month.
Overall Rating: 6.5/10 March 22, 2004
"Not the best, but will do in a pinch."
I've had 2 of these heaters fail on me around the 2 year mark now, and I'm not very please with that. I've had other brands of heaters last 10+ years. this made me remove the 300w(less then 6 months old) from my marine tank's sump for inspection, and I found weld type marks on the glass where the controler gets very hot. Its no wonder these heaters give out. I removed that heater, and replaced all my heaters with tronic's and ebo-jager's. I hung on to a couple of the newer thermals I had in case of emergency, but I don't think I will be depending on this heater for day to day use any more.
Kinguni has used this product for 3-12 Months.
Overall Rating: 7.5/10 March 15, 2004
"Good heater - temperature setting is wrong"
I have the 100 watt model, and the one thing I have to say is to make sure you verify your water temperature with a thermometer since the temperature setting dial is wrong. 76 on the dial on mine is actually over 80.

Other than that, it keeps a very steady temperature in my aquarium.
natealvis has used this product for 3 Years or More.
Overall Rating: 9/10 December 27, 2003
"work's great"
i have had a 200 watt heater in my 35 gallon saltwater aquarium for three or more years, then it started to form a precipitate on the inside, as well as looking like it had caught on fire. i have had three of these, the other two work fine. it keeps a perfect temperature, but heaters can only work so long, i replaced it with a visi-therm, which after six months i have to replace, and i am thinking about another pre setter
Bangbang has used this product for 1-3 Years.
Overall Rating: 9/10 August 6, 2003
"No problemo"
I have used these without any mishaps. My 300 is on a 100 marine tank at a constant 76 degrees.
Lauren has used this product for 1-3 Years.
Overall Rating: 7.25/10
"Pretty good"
It's provided really consistent water temperature. At first I had to fiddle around with the setting gauge for a while to get it right (it's not that clear) but now that it's set it's great; I never have to touch it.
manofsnow has used this product for 1-3 Years.
Overall Rating: 3.75/10
"Killed all my fish!!!"
I used to deal these at my place of epmloyment and used to swear by them. I would sell them to everyone and everything. A few months later they started coming back for failing. I didn't think anything of this using them myself and one day it didn't turn off and I lost over $1,000 if fish. I would never suggest this product to anyone and would go with a Tronic or other better brand.
rik125 has used this product for 1-3 Months.
Overall Rating: 9.5/10
"great heater"
The thin size makes this heater look better than others .I only had to adjust one time and my tank is a consistent 80` very accurate.
Reiner has used this product for 3-12 Months.
Overall Rating: 8.75/10
I have a 300 watt in my 80 gallon tank and it keeps the temp at a constant 76 degrees. At night the room temp is set to 65 but the tank always stays the 76. I like it better then the Ebo since the Od of the heater is about half of the Ebo. I also have a 75 watt on my small 26 gallon tank for about 18 month and had never any problems either.
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