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Finnex HMO Heater w/ Digital LCD Controller

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Finnex

HMO Heater w/ Digital LCD Controller

78% Recommend this to a friend (119 of 153)

153 Reviews

HMO-100 Finnex Heater

$34.99

Special Price: $31.49

SKU: 300121

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HMO-200 Finnex Heater

$38.99

Special Price: $35.09

SKU: 300123

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HMO-300 Finnex Heater

$41.99

Special Price: $37.79

SKU: 300124

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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-100: 100W – 20-30 Gallon tank - 6.7" Long
HMO-200: 200W – 60-80 Gallon tank - 10.6" Long
HMO-300: 300W – 80-100 Gallon tank - 11.9" Long

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 startup up.

Please note that the digital LCD display reads in Fahrenheit.

Items 1 to 12 of 153 total

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Good Heaters - quality product - Trusted By Dmize on 1/1/2019

Dmize would recommend this product to a friend

These heaters are pretty nice. They are made of good quality materials. I do wish the heaters digital controller would be a little nicer but, overall the package is nice. I run 2 of the 200W ones in my 150G system. I have a temp window of 78-79 controlled with my Apex and they heat up the tank super quick. 4 Stars because one failed after 1 year. Just purchased a replacement for it same model. I trust these heaters.
Easy use By Bow69 on 9/8/2018

Bow69 would recommend this product to a friend

Seems to heat consistently. Had to set the controller at 82f to get a tank temp of 78f.
Could be good bue terrible By Andrew on 3/14/2018

Andrew wouldn't recommend this product to a friend

Does Finnex even have quality control? Apparently not. As mentioned in many reviews the thermometer device within this unit is atrocious. I have it set on max temp somewhere around 95 degrees and somewhere around 77.5 degrees actual water temp (verified +/- .5 or so through various thermometer devices) the heater registers 95 and will not send power to the heating element. I choose to use units with an independent thermometer control in the case that there is a temp probe malfunction with the Apex unit. Well this piece of crap will not function above 78 degrees and I prefer to run 78-79.
Good only if you use with Apex/Reefkeeper By Aquanaut on 2/19/2018

Aquanaut would recommend this product to a friend

The heater part is well made, but as others have said the temp settings and readings are garbage. Mine reads 5 deg F higher than the tank. Without an external controller such as the Reefkeeper (what I use) or Apex I would not use this. With the controller it is good my temps are constantly 77.4-77.5
Do not buy this heater By Jim on 2/11/2018

Jim wouldn't recommend this product to a friend

I read the reviews and got 2 anyway. The temp probe is part of the heating element housing and it tries to "estimate" the temperature which in my case reads from 80-84 degrees when it is actually about 78. I don't mind it reading high but it wanders over 4 degrees with the water temp being consistent. I checked it with a recently purchased calibrated thermometer while mixing water in a trash can.
Using it with an Apex controller I had to set the temp at 85 for it to consistently stay on with the Apex programmed with 78.3 and 78.5 range.

The problem is the location of the temp probe (built in to the heater housing) and the "estimating" the heater does to try and read the temp of the surrounding water.

I really like the ViaAqua heaters, wish BRS carried them. I just replaced 2 in my tank, one for 3 1/2 years. I have purchased 2 new ones and the Finnex heaters are in the trash.
Not too happy with my purchase of HMO-200 Finnex Heater By Michael on 1/20/2018

Michael wouldn't recommend this product to a friend

I am NOT happy with my purchase, PLEASE believe the reviews about the heater, the controller is set at 82F and the water in a 30 gallon system is 78.6F. Purchase a Neo-Therm if you need something under 150w.
I am in the process of replacing the Finnex with a 150w Neo-Therm, personally I should have believed the reviews.
Calibration is non existant By Chris on 1/19/2018

Chris wouldn't recommend this product to a friend

I thought I was buying a good heater but I put my hand in the tank today and realized it's pretty cold so I set up three different thermometers in my tank and all three were reading in the 73 range while the heater was set at 78 and not even heating. I guess I'll have to boost it up to get all the thermometers reading 78. My poor livestock!
Inaccurate settings, bad product By Ben on 1/10/2018

Ben wouldn't recommend this product to a friend

The thermometer for the heater is built into the body itself, so the heater cannot get accurate temperature readings of the tank. When it turns on and heats up, it reads the tank as warm and switches off again. It almost froze our 125 gallon reef. I've been through two with the same problem.

Bring back the old model with the separate temperature probe!
Finnnex 100 watt digital heater By Chuck on 12/15/2017

Chuck would recommend this product to a friend

I really like the digital part. I have had good luck with the heater so far. I have checked the temp. with another unit I trust and both register great.
At least 8 degrees off By Guy on 12/10/2017

Guy wouldn't recommend this product to a friend

As with many reviewers here, I must set the heater much higher than the water temp needed. As it stands now I must set the Heater Temp at 89 degrees F to get a water temp of 78.5 +/- ...This is totally unacceptable. I have the 300 in a 29 gallon sump feeding a 75 gallon display.
Ordered 3 only 1 worked as it should. By Ryan on 12/8/2017

Ryan wouldn't recommend this product to a friend

I ordered 3 in total (counting returns). All were in high flow, would heat up, but only 1 was "accurate" on temperature. Meaning 2 of them would show wild swings in the supposed water temperature on the high side (10-16 degrees) whenever they turned on.

I tried facing in various directions, again in high flow to wisk away the heat) but they simply are not shielded enough to work without great concern of a tank not heating properly. Which as we speak is happening according to my Apex and I'm out of town.
No good... By Alex on 12/3/2017

Alex wouldn't recommend this product to a friend

I've used the 100W version of this heater for a few months only to wake up to the loud buzzing noise of the temp getting too low in my tank. Turns out the heater just stopped working all together? After 3 months? Not worth the risk.

Loved the idea of digital setting and LCD readout, but reliability comes first.

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The BRS team will respond to your question as soon as possible. The best questions will be shared on this page to help other reefers in the future.

What is the length of the 150w?

Question posted 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

Finnex

HMO Heater w/ Digital LCD Controller

Good Heaters - quality product - Trusted By Dmize on 1/1/2019

Easy use By Bow69 on 9/8/2018

Could be good bue terrible By Andrew on 3/14/2018

Good only if you use with Apex/Reefkeeper By Aquanaut on 2/19/2018

Do not buy this heater By Jim on 2/11/2018

Not too happy with my purchase of HMO-200 Finnex Heater By Michael on 1/20/2018

Calibration is non existant By Chris on 1/19/2018

Inaccurate settings, bad product By Ben on 1/10/2018

Finnnex 100 watt digital heater By Chuck on 12/15/2017

At least 8 degrees off By Guy on 12/10/2017

Ordered 3 only 1 worked as it should. By Ryan on 12/8/2017

No good... By Alex on 12/3/2017

BRStv Investigates: How accurate are heaters and which one is the best?

What is the length of the 150w?

Would 2 HMO-200 Finnex Heaters work for a 120 gallon reef tank?

How long is the 100w? Would it fit in the back of an Innovative Marine Nuvo 20?

How long is the 200W heater?

I have 150 gal salt water can i use 2 finnex 300 digital control hmo heaters

Would 2 300w heaters work in a 215g? I figure with the rocks it prob. more like 200g of water? Also, can I lay them down flat on the bottom of the sump?

How much clearence does the 200w heater need? My sump is only 12" wide

Can the Finnex HMO be mounted in the tank vertically, or is horizontal mounting the only option?

How long is the 300W heater?

Are the finnex heaters grounded, do they have a three pronged plug?

I have 220 gal aqurium . Will 2 300 watt heater be enough ?

Are these submersible...also what is the length of the 150 watt

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?

IF MY TANK IS 60 GALLONS WOULD YOU RECOMMEND THE HMO-150 OR HMO-200?

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

What size would you recommend for a 29 Gallon JBJ Nano Cube? And more importantly, will it fit in the back?? Thanks!

Do have a controller that controls both the heater and the chiller ??

What size would you recommend for a 29 Gallon JBJ Nano Cube? And more importantly, will it fit in the back??
Thanks!