Finnex HMO Heater w/ Digital LCD Controller

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Quick Overview

Maintain temperature control to provide a safe and stable environment for your tank inhabitants with the Finnex HMO Titatium Digital Control Heater.

Digital accuracy within to +/-2°F keeps water temperatures at a constant level.




HMO-50: 50W – 10-20 Gallon tank

HMO-100: 100W – 20-30 Gallon tank

HMO-150: 150W – 30-60 Gallon tank

HMO-200: 200W – 60-80 Gallon tank

HMO-300: 300W – 80-100 Gallon tank

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  • Quick Overview

Maintain temperature control to provide a safe and stable environment for your tank inhabitants with the Finnex HMO Titatium Digital Control Heater.

Digital accuracy within to +/-2°F keeps water temperatures at a constant level.


HMO-50: 50W – 10-20 Gallon tank
HMO-100: 100W – 20-30 Gallon tank
HMO-150: 150W – 30-60 Gallon tank
HMO-200: 200W – 60-80 Gallon tank
HMO-300: 300W – 80-100 Gallon tank

Finnex HMO Heater w/ Digital LCD Controller

82% Recommend this to a friend (113 of 137)

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HMO-50 Finnex Heater
SKU: 300120
Preferred Reefers earn 160 points
$32.99
$28.99  
 
 
HMO-100 Finnex Heater
SKU: 300121
Preferred Reefers earn 170 points
$34.99
$30.99  
 
 
HMO-150 Finnex Heater
SKU: 300122
Preferred Reefers earn 180 points
$36.99
 
 
HMO-200 Finnex Heater
SKU: 300123
Preferred Reefers earn 190 points
$38.99
 
 
HMO-300 Finnex Heater
SKU: 300124
Preferred Reefers earn 205 points
$41.99
 

Availability: In stock

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Product Questions

what is the length of the 150w?
Question by: RT on Apr 22, 2016 4:32:00 PM
Great question!
The length is 7.8" you will need 9" of clearance to handle the cable from the top.
Answer by: Connor (Admin) on Apr 26, 2016 6:45:00 PM
Would 2 HMO-200 Finnex Heaters work for a 120 gallon reef tank?
Question by: Jeff on Jul 25, 2016 1:44:00 PM
Hi Jeff,
The 200w HMO heater is good for tanks around 60-80 gallons and two of them would be perfect for a 120 gallon tank. Thanks for the question and if you have any more just let us know.
Answer by: Charlie (Admin) on Jul 25, 2016 2:50:00 PM
How long is the 100w? Would it fit in the back of an Innovative Marine Nuvo 20?
Question by: Rob on Aug 19, 2016 2:24:00 PM
Hey Rob,
The 100w model measures 6.6" long and would certainly fit in the Nuvo 20.
Answer by: Jason Smith (Admin) on Aug 19, 2016 3:29:00 PM
How long is the 200W heater?
Question by: Todd on Feb 7, 2016 8:11:00 AM
Great question!
The 200 watt will be 11" long. Feel free to let us know if you have any further questions!
Answer by: Connor (Admin) on Feb 10, 2016 6:46:00 PM
i have 150 gal salt water can i use 2 finnex 300 digital control hmo heaters
Question by: lisa on Sep 9, 2015 2:49:00 AM
Great question!
2x 300 watt heaters would be a perfect set up! Feel free to let us know if you have any further questions!
Answer by: Connor (Admin) on Sep 15, 2015 6:08:00 PM
Can the Finnex HMO be mounted in the tank vertically, or is horizontal mounting the only option?
Question by: Eric Hall on Jul 27, 2016 2:54:00 PM
Hi there,
The HMO heaters can be mounted in any orientation and it shouldn't cause any issues.
Thanks for the question and if you have any more just let us know!
Answer by: Charlie (Admin) on Jul 27, 2016 3:01:00 PM
How long is the 300W heater?
Question by: Bill Peterson on Aug 21, 2015 4:14:00 PM
Great question!
The Heater is 12" long exactly. However 13" clearance would be needed to fit with the chord coming out of the top of the heater. Feel free to let us know if you have any further questions!
Answer by: Connor (Admin) on Aug 24, 2015 2:24:00 PM
Hello, I have a 120 gallon tank with 30 gallon sump and looking to update my heater. I wanted to add 2 but wanted both to be able to handle the tank is one is to fail. I see the measurements you provided and tank size but could you fill in the blanks for acutall length and area needed for these to fit ?
Question by: Jason on Jan 5, 2017 12:35:00 PM
Great question! You can use the same chart listed on the HMX-S page for the measurements of the heating elements. Essentially they are the same length. :-)

https://www.bulkreefsupply.com/hmx-s-heater-w-digital-led-controller-finnex.html
Answer by: Randy (Admin) on Jan 11, 2017 12:12:00 PM
I have 220 gal aqurium . Will 2 300 watt heater be enough ?
Question by: Andrik on Apr 26, 2016 9:11:00 PM
Great question!
You will need between 550-1000 Watts in your system. 2x 300 watt heaters would work well!
Answer by: Connor (Admin) on Apr 27, 2016 3:17:00 PM
are these submersible...also what is the length of the 150 watt
Question by: gary gonzales on Mar 6, 2016 1:36:00 PM
Great question!
These are submersible and the cord from the wall to the controller is 4 feet and from the controller to the heater is 2 feet. Feel free to let us know if you have any further questions!
Answer by: Connor (Admin) on Mar 9, 2016 5:17:00 PM
I am starting a 55 gallon salt water. If I add a protein skimmer what size would I need? If I dont add the skimmer will the size suggested be to much?
Question by: Kathy Mitchum on Jan 15, 2017 8:19:00 PM
Hey there! I would recommend a 200W heater for your size of tank. The use of a skimmer doesn't change the water volume of your tank, so no need to worry about including it in the sizing of your heater. :-) Happy Reefing!
Answer by: Randy (Admin) on Jan 16, 2017 1:36:00 PM
IF MY TANK IS 60 GALLONS WOULD YOU RECOMMEND THE HMO-150 OR HMO-200?
Question by: PRESTON on Oct 1, 2013 9:13:00 AM
For a 60g tank we would suggest using the 200w heater. Its best to err on the larger size in case you need it (say you have a particularly chilly day).
Answer by: Bulk Reef Supply on Oct 1, 2013 9:13:00 AM
I have a 54 corner with sump. If I want to go with two heaters so one is a spare if one fails could I get one without controller as backup set low and the other with controller set-up? If this is acceptable what size would you recommend? Also do you recommend them in the skimmer section or pump section? Thank you.
Question by: Erik on Jan 18, 2016 5:19:00 PM
Great question!
You can certainly select 2 heaters one which the controller set to a slightly lower temperature. For this size tank you will want 2.5-5 watts per gallon around 250 watt total. Here you could select 2 150 watt heaters to work well and place in the same section of the sump if needed!
Answer by: Connor (Admin) on Jan 27, 2016 1:45:00 PM
Hello, I have a 15 gallon and 20 gallon tanks. Im thinking of getting the 50 watt for the 15 gallon but what should I get the 50 watt or 100 watt for the 20 gallon tank? Thank you -Paul
Question by: Paul on Mar 23, 2016 12:01:00 PM
Great question!
Typically you will want between 2.5 watt to 5 watts per gallon. Ideally the 100 watt will work great with the 20 gallon tank. Feel free to let us know if you have any further questions!
Answer by: Connor (Admin) on Mar 23, 2016 2:09:00 PM
What size would you recommend for a 29 Gallon JBJ Nano Cube? And more importantly, will it fit in the back??
Thanks!
Question by: Toby Robinson on Feb 2, 2016 8:30:00 PM
Great question!
You will want 100 watt heater for best performance. These will sit in the back no problem. Feel free to let us know if you have any further questions!
Answer by: Connor (Admin) on Feb 24, 2016 5:08:00 PM
I have a 92 Gallon Corner Bowfront with a 20 Long Sump and a 40 Breeder Frag/Refugium all plumbed together. Would you recommend 2 300 Watt heaters for this? Also, is the "controller" one that will kill the power to the heater if it gets stuck in the on "position"?
Lastly, what would you recommend for a 29 Gallon JBJ Nano Cube and would it fit in the back of the filter area?
Thanks!
Question by: Toby Robinson on Feb 3, 2016 1:40:00 PM
Great question!
For the initial set up 2x 300watt heaters would work out great! The controller is the part which turns on or off depending on temp in the water column. For a 29 gallon tank we recommend anywhere from 75-150 depending on room temperature. usually 75 watt is plenty. Feel free to let us know if you have any further questions!
Answer by: Connor (Admin) on Feb 24, 2016 6:19:00 PM
Do have a controller that controls both the heater and the chiller ??
Question by: ed Secula on Oct 7, 2013 11:38:00 AM
Hey Ed,
For something like that you would be best served by an aquarium controller. The most basic of which is the Reef Keeper Lite unit and it will do both of those things as well as give you two more outlets you can use as timers or other functions.

https://www.bulkreefsupply.com/reefkeeper-lite-basic-digital-aquatics.html
Answer by: Bulk Reef Supply on Oct 7, 2013 11:38:00 AM

Full Details

Finnex Digital Titanium Heaters implements new technology for precision digital control for maintaining water temperatures at a constant level. The titanium tubes are corrosion-resistant and virtually unbreakable. These advanced heaters create a safe, healthy, and stable temperature by maintaining water temperatures within +/-2° F of the set value for your tank. Additionally, Finnex HPS 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 LCD display reads in Fahrenheit.

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  • Not calibrated from factory correctly By Robert on 7/26/2017

    It's about 5 degrees off. I have 3 thermometers that are all within 1 degree of each other. They all show 79 while this thing shows 84. I'm trying to start up a new tank here but I don't really trust this heater. I'll keep an eye on it while the tank cycles. I'll just have to set it 5 degrees high but Definitely not putting any fish in until I'm sure this works.
  • Mediocre Heater with Terrible Warranty Period By Logan on 7/14/2017

    Bought two, have to keep both set at 84 to keep the water at 78 since the heating element and probe are not well isolated.

    Then 10 months after purchase one died, and the warranty is only 6 months. I'd expect at least a year warranty on something like this.
  • Great control By Oranin on 7/3/2017

    I like this heater because it will not shatter with glass. Also the controls are easy to read and set. It’s reliable and fits in the back chamber of an AIO.

    I dislike the hook attachment to hang the temp reader because it was easily lost and now I just free hangs
  • Good Little Heater By Jeffrey on 5/27/2017

    Works good for me. Have had the 200w for over a year no problems. Just got the 300w for my new tank and like the small size for a 300w heater.
  • great product By drobart on 5/18/2017

    I own several of these 300 w units, the first one lasted about a year, the second and third one are still going strong, still working after 2 years, I did just purchase a new 300 w unit and was impressed with the new style heater, the temperature line is now combine within the unit instead of a second line running off of the unit. more stable.
  • Failed after 1 year By Ed on 4/9/2017

    Almost 1 year to the day after installation the heater failed. The warranty is 6 months. My expectation would be this product would last longer than a year and the warranty should be at least that long.
  • Inexpensive and worked well. By Loren on 4/1/2017

    I bought this item for a small isolation tank. I had another brand heater without a control which was supposed to keep the aquarium at 78; but it kept it between 80 and 81.5. This is too hot for me. So I bought this. I set it at 77 degrees and it keeps the tank between 76.1 and 76.3, which is where I want it (I have a good reference thermometer). This is perfect with little variation. I know these have some negative review, but I have had good luck with it.
  • Great heater By Mark on 3/24/2017

    I've have had this 300 watt Finnex HMO heater in my tank for over 3 years and it has kept my tank at 80.5 degrees since day 1
  • One Month By Grink on 2/6/2017

    Ceased to operate after only one month of use.
  • Both failed By John on 1/22/2017

    Within the first year both heaters failed. Luckily I had a Reefkeeper plus that alerted me to the failure.
  • JUST NO By Junbin on 1/8/2017

    Do not buy this heater, this heater doesn't stay at desired temperature! Trust me!
  • Horrible Heater DO NOT BUY By dwayne on 12/14/2016

    Bought the 300W for my 75 G reef tank, installed last night only to wake up to a very cold tank. Checked the controller, saying it 78 degree when my apex as well as my other temp probe confirming it is 75 degree. Set the temp controller on the heater to 92, Heater still shut off. Returning this piece of crap. Going back to Aqueon Pro Heaters