Finnex 100-Watt Hang-On Electronic Controller Aquarium Heater, Titanium Tube, 20 to 30-Gallon

This heater has been very consistent in our 10gal tank. I like that the temperature control sits outside of the water for easy access (although it is not needed once you set the tank to the right temperature.)

Keep in mind that the temperature number is more of a guiding number. Your tank will interact with the room temperature, so the real temperature in the tank will be somewhere between the outside temp and the heater set temp. Our 10 gal tank is set to 82, and the room temp is 70. Under these settings the in-tank thermometer keeps steady at 78. The same is true for a different heater we have in our 30 gal tank. I recommend setting your tank by the thermometer reading.

Another thing worth noting is that the suction cups don't do their job too well. It seems that one or the other is always coming off, which gets a bit annoying over the long run.

...immediately after the warranty period is over. I have had the heater master controller break on 3 different occasions and repaired, not replaced, by Finnex for $10-15 each time. It will last for another 6-9 months. When you are dealing w/your heater in the aquarium, you have to be very careful.

Concurrently, I purchased 3 Finnex titanium heaters with controllers and 2 of them have gone dead (luckily in the "off" position) within a month after the warranty period. Luckily, the Finnex controllers are connected to Medusa controllers---which are worth the money...the Medusas have worked perfectly for 5+ years. Yes, it's overkill with the controllers, but the lack of reliability with the Finnex heaters and controllers makes it imperative that I have a safety net the won't allow the Finnex heater/controller to boil my aquarium.

Buy a Finnex frameless aquarium, they look fantastic...but think twice before you consider Finnex heaters or controllers...if you must buy it, connect another controller to govern the Finnex product.

I bought the Finnex heaters and controllers because of the reputation of their tanks. Unfortunately, the reputation, and more so the reliability, did not extend to their heating product line. Save yourself some grief and heed my words.

Buy Finnex 100-Watt Hang-On Electronic Controller Aquarium Heater, Titanium Tube, 20 to 30-Gallon Now

I am fairly happy with the quality of the heater, and especially with its high wattage for such a small size. The only problem I have seen is that the temperature controller does not set the heater accurately. I had to set the dial four degrees warmer than the temperature of the tank. The heater does, however, work well and keeps the temperature very consistent.

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This unit works great so far as opposed to several others which failed within the first week. It is well built.

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Thought this was a decent heater (& it was for 6 months). Had it set for 72 degrees.... Checked it tonight & the water temperature was 102 degrees! Everything DEAD. The seller, Coral Aquatics, says it's Finnex's problem. Finnex only has a 180 day warranty (I'm 1 1/2 months past that). Recommend avoiding their products unless you are willing to gamble on a mass kill.

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