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Home » Brands » All Brands » Hagen » Hagen Fluval M100 Submersible Aquarium Heater 100W
Hagen Fluval M100 Submersible Aquarium Heater 100W
Hagen Fluval M100 Submersible Aquarium Heater 100W

Hagen Fluval M100 Submersible Aquarium Heater 100W

Item #: 015561107822
Reg: $38.99
Sale: $29.99
You Save: $9.00 (23%)
  • Description
  • Reviews
Fluval M100 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 30 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
Review Summary
15 Reviews
80% (12)
13% (2)
0% (0)
0% (0)
7% (1)
93% Recommend this product (14 of 15 responses)
By Diane
Great buy
September 24, 2021
Love my new heater blends in great. Love that is submersible. Hopefully it works for a long time. The price was also great
By Greg
Great prices great services
July 29, 2021
By Codi M.
Pet guys awsome
September 3, 2020
My fluval heater arrived fast and works great couldn't be any more pleased with pet guys and fluval products
By Ryan
Excellent quality heater, long lasting
July 29, 2020
I have had 2 of these heating my aquarium for about 9 years now, without fail. It takes less time to get the initial temperature setting right than I have experienced with other heaters. We have several large fish that tend to collide with the heater every once in a while and they have held up well.
By Michael M.
Fluval M300 Heater
July 13, 2020
Been using the Fluval M200 and 300 heaters for years with out any problems, like with some others I tried. I like the mirror look instead of the black tube . Have two M300s on my 125 a on my second M200 on my 60 Oscar tank that been running for ten years.
By Shane
Great heater
September 13, 2019
If I bought it local would have paid twice as much. Fast shipping
  • Great heater
  • None
By Jeremy
Great Product
August 8, 2019
Very nice heater. Works well and gives me zero problems. 👍👍
By Sandra
Fluval M50 Aquarium Heater 50W
January 18, 2018
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
Fast shipping!! A+++ Product as described.
April 4, 2014
Very happy with service and how fast item was received. Thanks
By C H.
Works Great!!!
December 25, 2013
Heater is great for my 35 gallon aquarium.. it is working perfectly!!
  • Ease of use. Good price. Delivery speed.
By Brian a.
Great product
April 11, 2013
Product works great. The 8 i placed in my 730gal holding tank heated the water from 60°f to 76°f in less than an hour.
  • Great price
  • looks cool
  • Turtles love to gather around them
By Rat
Mojave Desert
Fluval M300 Submersible Aquarium Heater 300W
December 31, 2012
Works great. Using it to heat a 120g tank. It seem to have no problems maintaining the correct temperature of 78 degrees.
  • Everything
  • Nothing
By Jayson
Alma, AR
April 15, 2012
This heater works perfectly. Great price.
I love PetGuys.
By Reta D.
Kelseyville, Californiaaun
Submersible Aquarium Heater Not Submersible
January 11, 2012
Inappropriate for a turtle tank. Labeling was misleading. Had to return both heaters.
  • Clearly 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
tank heater
November 14, 2011
very good
  • love this heat, it takes the guess work out of setting temps.