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 HMX-S heater is virtually unbreakable unlike glass heaters and are corrosion resistant.
The new and improved controller on the HMX-S series has been modernized, with a touchpad control interface, and a crisp LCD display, allowing you to know the temperature of your tank at a glance from across the room.
All HMX-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 HMX-S heaters come with an attached digital, touchpad 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 HMX-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. Additionally, Finnex digital heaters are equipped with memory. so in the event there is a power outage, your heater will resume your preset temperature settings at start up. Please note that the digital display reads in Fahrenheit.
Finnex HMX-S Heater Comparison Chart
| Model | Wattage | Amp | Control Range | Tank Size | Overall Length |
| HMX-S 50 | 50 | .45 | 68 - 92 degrees | 5 - 20 gal | 5.75 inch |
| HMX-S 100 | 100 | .9 | 68 - 92 degrees | 21 - 30 gal | 6.75 inch |
| HMX-S 150 | 150 | 1.35 | 68 - 92 degrees | 31 - 60 gal | 8.0 inch |
| HMX-S 200 | 200 | 1.8 | 68 - 92 degrees | 61 - 80 gal | 10.75 inch |
| HMX-S 300 | 300 | 2.7 | 68 - 92 degrees | 81 - 100 gal | 12.0 inch |
| HMX-S 500 | 500 | 4.5 | 68 - 92 degrees | 101 - 120 gal | 15 inch |
HMX Owners Manual| SKU | HMX-S-Heater-Digital-LED-Controller-Finnex |
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Product Questions
The HMX-s heaters cannot be calibrated, however if you ever do notice their temperature is off, just use it as a reference. In all honesty depending on what your reference for temperature is, the heaters are usually pretty accurate within a degree or two.
we recommend 2.5-5 watts per gallons. 250-500 watt heater depending on the background temperature of the room.
This will have a plastic cover and may be able to prevent small splashes however this is not designed to be water resistant and if water is left on it or creeps through the connection will cause damage.
Lastly, is the display pad waterproof?
Thank you.
The Display will be used to set the ideal temp, after a few seconds it will display the actual tank temperature. The display will be +- 2 degrees. Teh display is not water proof and will need to be placed with care. This is slightly water resistant but not proof.
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