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Most Recent Questions
Recent Question:
what heater is best for Neon Blue Guppy
Recent Question:
just bought a 75 gallon aquirum for my turtle need to know what fliter system i need for it
Recent Question:
Can fish touch it?
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Would you please tell me how can I get coupons?
Questions with Most Recent Answers
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Can i use this heater in my 1 gal. betta tank?
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I didn't follow the startup instructions properly
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how do the heaters do on the powerbill

Customer Questions & Answers for
Hydor Hydor THEO (UL) Submersible Aquarium Heater

Patented PTC heating system guarantees safe operationFish tank water heater suitable for freshwater, marine and tropical aquariumsMade from specially engineered shatterproof glassHighly accurate micro-switch technology keeps temperature to within +/- 1°FMay be vertical or horizontal – suction cups secure the aquarium water heater's position in your tankCompletely submersible unit – power cord measures 6 feet in length
Customer Questions & Answers:
8 Questions,
 | 
9 Answers
Overall Rating:
3.429 out of 5
3.4
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Questions & Answers for Hydor Hydor THEO (UL) Submersible Aquarium Heater

Question

battery operated?

Do you need to plug in the heater or is it battery operated? Is there any battery opreated heater?
asked 2 years, 11 months ago
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by
Nanette
San Francisco
on Hydor THEO (UL) Submersible Aquarium Heater
+2points
4out of 6found this question helpful.
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2 answers
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answer 1
It is an electric heater
answered 1 year, 1 month ago
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by
walkinmomma
Laporte, PA
0points
1out of 2found this answer helpful.
answer 2
You have to plug this one in. But I highly recommend this heater. Check out my preview on the product page.
User submitted photo
Best Answer
answered 2 years, 10 months ago
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by
animalloverjuly
Augusta, GA USA
+1point
3out of 5found this answer helpful.
Question

Does this heater come with more than one suction cup clip?

Just wondering if, for stability reasons, if this heater (25w) comes with at least 2 suction cup clips to secure to aquarium side while in use in a horizontal orientation. I currently have a different brand heater that is secured with a single clip and it moves around too much for my liking.
asked 2 years, 1 month ago
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by
bettabeauty
on Hydor THEO (UL) Submersible Aquarium Heater
+1point
1out of 1found this question helpful.
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2 answers
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answer 1
It comes with 2 suction cups
Best Answer
answered 1 year, 1 month ago
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walkinmomma
Laporte, PA
+1point
1out of 1found this answer helpful.
answer 2
Yes, the 25w hydor comes with 2 suction cups and can be secured in a horizontal or vertical position.
answered 1 year, 9 months ago
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by
swhite304
The Dalles, OR
+1point
1out of 1found this answer helpful.
Question

Hello i bought this heater, the light turns on for a few seconds and then it turns off? Is it broken?

asked 1 year, 1 month ago
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by
andipad
on Hydor THEO (UL) Submersible Aquarium Heater
-1point
0out of 1found this question helpful.
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2 answers
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answer 1
It is auto regulating the temp. That is perfectly normal. Use a thermometer to verfiy the water is at the temp you want.
answered 10 months ago
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by
TekVu
OK
0points
0out of 0found this answer helpful.
answer 2
Test it by putting the heater into a pitcher of cool water, adjusting the dial to the temperature you want and leaving overnight. Check the next morning for accuracy. Remember you do not want to change the temperature of the water too quickly or it will stress the fish, therefor the heater may be cycling on and off for that reason... I thought the same thing but have had it in the tank for several days and it is maintaining right at the set temperature.
Best Answer
answered 1 year, 1 month ago
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walkinmomma
Laporte, PA
+1point
1out of 1found this answer helpful.
Question

what temperature can you get out of it

asked 2 years, 2 months ago
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Barracuda101
on Hydor THEO (UL) Submersible Aquarium Heater
+2points
2out of 2found this question helpful.
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1 answer
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answer 1
The dial ranges from 67 to 91*.
Best Answer
answered 1 year, 1 month ago
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walkinmomma
Laporte, PA
+1point
1out of 1found this answer helpful.
Question

What is the length of the 25 watt heater for a 2 gallon tank?

asked 1 year, 8 months ago
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cellofish
on Hydor THEO (UL) Submersible Aquarium Heater
+1point
1out of 1found this question helpful.
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answer 1
About 7" total I have about 6" in the water-there is a line to indicate the correct water level on the heater.
Best Answer
answered 1 year, 1 month ago
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walkinmomma
Laporte, PA
+1point
1out of 1found this answer helpful.
Question

What is length in inches of Theo-150 Aquariom heater

asked 2 years, 11 months ago
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by
BobA5
on Hydor THEO (UL) Submersible Aquarium Heater
+7points
8out of 9found this question helpful.
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answer 1
Product Dimensions: 3.5 x 2 x 10 inches
Best Answer
answered 2 years, 9 months ago
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by
Zatharas
0points
1out of 2found this answer helpful.
Question

is this product good for acuatic turtles?

3 inches yellow belly sliders 2-turtles and i have a 20 gallon tank filled with 10 gallons of water is this a good produt for them?
asked 2 years ago
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by
DiDi21
Allentown,PA
on Hydor THEO (UL) Submersible Aquarium Heater
-1point
0out of 1found this question helpful.
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Question

Does the dial show the temperature setting in Fahrenheit of Celcius?

asked 7 months ago
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ndohvu
on Hydor THEO (UL) Submersible Aquarium Heater
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