petco.com Ratings and Reviews

Customer Reviews for Hydor THEO (UL) Submersible Aquarium Heater

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
Average Customer Rating:
3.429 / 5
3.4
 / 
5
(7 Reviews) 7
Open Ratings Snapshot
Rating Breakdown 7 reviews
5 stars
4
4 stars
0
3 stars
0
2 stars
1
1 star
2
4 out of 7(57%)reviewers recommend this product.
Customer Questions & Answers:
8 Questions | 9 Answers
Customer Reviews for Hydor THEO (UL) Submersible Aquarium Heater
Review 1 for Hydor THEO (UL) Submersible Aquarium Heater
Overall rating 
1 / 5
1 / 5

Leaked

PostedDecember 2, 2013
Customer Avatar
TekVu
from OK
After a month of use I noticed bubbles inside the heater. It is leaking somewhere at a seal since the glass is not cracked. Hydor expects me to mail it in for repair in the middle of winter. I will have to buy another heater in the meantime or just not buy Hydor products again.
No, I would not recommend this to a friend.
+3points
3of 3voted this as helpful.
Review 2 for Hydor THEO (UL) Submersible Aquarium Heater
Overall rating 
1 / 5
1 / 5

Do not buy

PostedNovember 3, 2013
Customer Avatar
Fishowner43
This product died within a day of purchasing it. So did the next one that I received when I exchanged the product. It doesn't keep the temperature warm and all and seems to stop working for no reason. It's really a waste of money.
No, I would not recommend this to a friend.
+4points
4of 4voted this as helpful.
Review 3 for Hydor THEO (UL) Submersible Aquarium Heater
Overall rating 
5 / 5
5 / 5

Excellent heater

PostedSeptember 22, 2013
Customer Avatar
walkinmomma
from Laporte, PA
After very disappointing results with other small heaters that could not be regulated I bought this one that is adjustable for the temperature range of 72-82* Works great and my fish are really happy!
I would recommend this to a friend!
+2points
2of 2voted this as helpful.
Review 4 for Hydor THEO (UL) Submersible Aquarium Heater
Overall rating 
5 / 5
5 / 5

Great Heater

PostedMay 11, 2013
Customer Avatar
Gamjr19
from Lodi, CA
Keeps my tank at a constant temp. Item arrived on time. Well worth the money!
I would recommend this to a friend!
+5points
5of 5voted this as helpful.
Review 5 for Hydor THEO (UL) Submersible Aquarium Heater
Overall rating 
2 / 5
2 / 5

Doesn't work as proposed

PostedJanuary 26, 2013
Customer Avatar
swhite304
from The Dalles, OR
I have a 5 gallon tank and bought this heater because it had an adjustable dial temperature control. The temp remains constant between 76-77 degrees even though I have the dial turned up to the highest setting. I wanted the temp to be around 78 degrees, this heater doesn't quite cut it. It doesn't work.
No, I would not recommend this to a friend.
+7points
11of 15voted this as helpful.
Review 6 for Hydor THEO (UL) Submersible Aquarium Heater
Overall rating 
5 / 5
5 / 5

Heater Hydor

PostedJanuary 15, 2013
Customer Avatar
Lilears1
from Omaha
Heater is small and sleek and should do great in this 40B tank, great price online too!
I would recommend this to a friend!
-1point
3of 7voted this as helpful.
Review 7 for Hydor THEO (UL) Submersible Aquarium Heater
Overall rating 
5 / 5
5 / 5

Great heaters

PostedSeptember 23, 2012
Customer Avatar
FishBui87
from Harrisburg PA
Been using these heaters forever
they're supposily shatter proof and have never had any go bad on me
recommend for anyone :D
I would recommend this to a friend!
+17points
21of 25voted this as helpful.