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Home » Fish » Equipment » Heaters » Hagen Fluval M300 Submersible Aquarium Heater 300W
Hagen Fluval M300 Submersible Aquarium Heater 300W
Hagen Fluval M300 Submersible Aquarium Heater 300W

Hagen Fluval M300 Submersible Aquarium Heater 300W

Item #: 015561107877
You Save: $9.00 (27%)
  • Description
  • Reviews
Fluval M300 Premium Submersible Aquarium Heaters are quality manufactured in Europe using superior components and construction. These sleek, compact Fluval heaters can be trusted for exceptional performance and unsurpassed reliability.


  • Suitable for aquariums up to 80 U.S. gallons
  • Exclusive mirror technology helps maintain the aquariums' natural look as the heater reflects the colors of the surroundings
  • Easy to adjust temperature dial
  • Cool blue on/off indicator lamp
  • Safe for fresh and saltwater aquarium use

Other Features:

  • Heat and shock resistant borosilicate reflective glass tube
  • Heat resistant techno-polymer conductor harness
  • High temperature resistant heating element
  • Silver nickel contact points
  • Machine assembled thermostatic blade
  • Computer calibrated thermostat
  • 16-point quality assurance program
  • Long life suction cups
8 Reviews
88% (7)
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0% (0)
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13% (1)
88% Recommend this product (7 of 8 responses)
By Sandra
January 18, 2018
Fluval M50 Aquarium Heater 50W
I have not had a chance to use the heater yet, but I'm sure that it will work fine with no problems. Pet Guys were a great find online. What the pet stores near me don't have, the Pet Guys do and they get it to me quickly and in perfect condition.
By Kyle
April 4, 2014
Fast shipping!! A+++ Product as described.
Very happy with service and how fast item was received. Thanks
By C. Hansen
December 25, 2013
Works Great!!!
Heater is great for my 35 gallon aquarium.. it is working perfectly!!
ProsEase of use. Good price. Delivery speed.
By Brian axie
April 11, 2013
Great product
Product works great. The 8 i placed in my 730gal holding tank heated the water from 60f to 76f in less than an hour.
ProsGreat price looks cool Turtles love to gather around them
By Mr. Rat
Mojave Desert
December 31, 2012
Fluval M300 Submersible Aquarium Heater 300W
Works great. Using it to heat a 120g tank. It seem to have no problems maintaining the correct temperature of 78 degrees.
By Jayson
Alma, AR
April 15, 2012
This heater works perfectly. Great price.
I love PetGuys.
By Reta Davis
Kelseyville, Californiaaun
January 11, 2012
Submersible Aquarium Heater Not Submersible
Inappropriate for a turtle tank. Labeling was misleading. Had to return both heaters.
ConsClearly labeled "submersible", but can"t figure out why it was definitely NOT--I have never seen that designation on a heater that wasn't fully "submergible."
By sandy
November 14, 2011
tank heater
very good
Proslove this heat, it takes the guess work out of setting temps.