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Fluval M300 Submersible Glass Aquarium Heater (300 watts)

Average Customer Rating:
2.5 out of 5
 out of 
Open Ratings Snapshot
Rating Snapshot (2 reviews)
5 stars
4 stars
3 stars
2 stars
1 star
1 out of 2(50%)reviewers would recommend this product to a friend.
Customer Reviews for Fluval M300 Submersible Glass Aquarium Heater (300 watts)
Review 1 for Fluval M300 Submersible Glass Aquarium Heater (300 watts)
0 of 1 found this review helpful.
1 out of 5
1 out of 5
Not Submersible
Date:March 17, 2014
Pet:Multiple Pets
I thought this heater would be fully submersible. It is not. The top needs to be out of the water. With the lip of the top around my aquarium to hold the glass top on it makes it impossible for this heater to work. Plus, I do not keep the water line down below the top trim. Very disappointed. Still don't have fish as I still need to go out and buy another heater. :(
Review 2 for Fluval M300 Submersible Glass Aquarium Heater (300 watts)
4 out of 5
4 out of 5
Easy to use
Date:January 1, 2014
My old heater that I was replacing did not have an actual temperature gauge on it. This fluval I set to about 75/76 and in 3 hours the 55gallon tank was at 77 degrees and has stayed that way for the last 3 weeks. Seems to hold the temperature. Works fine