Finnex 300-Watt Hang-On Digital Controller Aquarium Heater, Titanium Tube, 80 to 100-Gallon

This was working fine for two years, then yesterday while I was gone I get an email from my Apex telling me the aquarium temperature was below my threshold. Turns out the heater was 'on', but the heating element no longer gets hot. Had to throw away and get another one. Done with Finnex.

purchased two 300W for a 150g reef tank. Had a pair of Marineland Steath heater in there for two years and it blew apart. One of the 300W HMO works fine, the second one would not heat up. Open the control box and found one of the leg of the SCR not solder on the board. Re-solder and it is working OK now. Seem like no QC took place.

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To my horror, I came home last night to a 96-degree reef tank. The heater failed in the on position. I lost 1 fish and all my corals. Just got done scrubbing the dead stuff off my live rock. My suggestion is to think twice about purchasing this one.

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Finnex HMO 300 Watt w/ Memorized Digital Controller Aquarium Titanium Heater (80 100 Gallons) My Finnex HMO 300 Watt Titanium Heater was inaccurate and seemed to me to be unreliable. The Finnex registered 77 deg. F, which was > 2 deg. higher than the 3 thermometers in my tank. Those 3 agreed among themselves within 0.2 deg. F. The heater responded poorly, or not at all, to my efforts to raise the temperature in the tank. I did not want to risk using the Finnex Titanium in my tank and discarded it. I have a 75 gal tank with two Eheim filters (with no filter heating elements). I had removed the two other heaters from my tank. I have had tropical fish tanks since the early 1940s.

Paul

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This heater is Terrible! I don't even want to give it one start but you cant give it negative stars.

I bought 2 of these. 1 for my 46 gallon tank and one for my 72.

In both cases the electronics where you change the temperature malfunctioned.

In one case it was not dangerous. The first case it just stopped showing the temperature. I could not tell if it was working since there is no light on the heater itself the only way I could tell if the heater was working was the press the up or down button and wait and see if my temperature went up or down. I did not want to Cook or Freeze my fish so I tossed that one out.

Yesterday the 2nd one malfunctioned and it could have been bad if I had not been at home.

I was in the kitchen cooking when I head a loud POP then a hiss from the fish tank. As I got closer to the tank I got a faint smell of smoke. Further investigation lead me to the heater and once again the plastic device used to turn the temperature up or down. The numbers burnt out again but this time it was very hot. I unplugged it. When I put it to my nose I could smell burnt electronics.

I originally wanted to buy the JBJ true temp 300W but I cheeped out. I will not make the same mistake twice!

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