HMA-S Heater w/ Analog Controller

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Heaters are by far one of the most important pieces of equipment on any reef tank. Finnex has been making high quality, compact electric, titanium heaters for years and allow you to create a safe and very stable temperature within the tank. The titanium body of the HMA-S heater is virtually unbreakable unlike glass heaters and are corrosion resistant.

All HMA-S heaters now include a plastic guard to cover the heating element portion of the heater. That will help keep any equipment or livestock from coming into contact with the element and overall making a much safer environment within the tank.


Finnex HMA-S heaters come with an attached analog controller that will allow you to precisely set the temperature within your aquarium. These heaters are great for fresh or saltwater aquariums that require a stable, and safe heating system. The HMA-S heaters will keep the temperature within a range of +/- 2 degrees from the set point and with the heating indicating LED you will know when the heater is producing heat or not.


Finnex HMA-S Heater Comparison Chart

Model Wattage Amp Control Range Tank Size Overall Length
HMA-S 50 50 .45 68 - 92 degrees 1 - 20 gal 5.75 inch
HMA-S 100 100 .9 68 - 92 degrees 21 - 30 gal 6.75 inch
HMA-S 150 150 1.35 68 - 92 degrees 31 - 60 gal 8.0 inch
HMA-S 200 200 1.8 68 - 92 degrees 61 - 80 gal 10.75 inch
HMA-S 300 300 2.7 68 - 92 degrees 81 - 100 gal 12.0 inch
HMA-S 500 500 4.5 68 - 92 degrees 101 - 120 gal 14.5 inch
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SKU HMA-S-Heater-w-Analog-Controller-Finnex
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Product Questions

Will this heater function accurately in the horizontal position, as in flat on a sump bottom where the flow from a baffle will move directly over it?
Question by: Cheryl Carter on Nov 19, 2017, 12:01 AM
These heaters will function just fine with the heating element laying horizontally. This is how many of our heaters are configured in our sumps here.

Have a great day!
Answer by: Zack on Nov 25, 2017, 8:30 AM
Will this controller keep its last set temperature if power is cut? I'm looking to use two of these as suggested in the BRS series. I am looking to tie two to my APEX, and set this temp controller a degree higher than the APEX is set to for redundancy.

Question by: Jon on Jun 29, 2016, 10:10 AM
Great question!
This will keep the temp recorded even when unplugged. Feel free to let us know if you have any further questions!
Answer by: Connor on Jun 29, 2016, 6:15 PM
Does the controller have the capability to turn the heater on and off after programming a set degree. For me, this heater will need to interface with my chiller so the two components do not fight against one another.
Question by: Shelly on Apr 28, 2016, 9:28 PM
Great question!
This heater will be able to control itself to turn on or off if above or below the set temperature. Feel free to let us know if you have any further questions!
Answer by: Connor on Apr 29, 2016, 9:11 AM