Knocking Heater

[JasonsPlecosCichlids]

So the past several weeks I've been hearing this knocking sound, I thought it was the air stones moving and tapping the glass. Well today it was very annoying so I took a look and noticed it wasn't the stones because they were not touching the glass. So I turned off everything and it stopped, turned it back on and came back again, then I turned things off one by one and came down to the heater. I turned the heater off and no sound, turned it on and the knocking came back. Its not cracked and holds the temp steady at 82. But just out of precaution I left it off and going to replace it. It's made by Aqueon.

 

[xraycer]

I have a cheap no-name glass one on my 29gal, that does that half the time. I have it hooked up to a controller so I'm not too concern about it. I actually have a replacement Aqeoun Pro heater that I've been procrastinating to swap it out with.

 

[pops]

this makes no sense to me, My fish will knock a heater against the glass, but how does it do it itself?

 

[pops]

electrical arcing?

 

[xraycer]

I'm guessing the rapid, high heat is causing some sort of expansion inside the heater

 

[pops]

possible also.

 

[Freshwater4Life]

Those Aqueon filters are infamous for making the knocking sound. Haven't heard of any issues besides just making you nervous when it knocks .

 

[Freshwater4Life]

Those Aqueon filters are infamous for making the knocking sound. Haven't heard of any issues besides just making you nervous when it knocks .

I meant heater of course.

 

[JasonsPlecosCichlids]

I'm not taking any chances, that's all I need is for it to malfunction and kill the fish, bust the glass, shock myself, etc. So in the trash it goes.

 

[Freshwater4Life]

Yea I personally don't own one. I stick with eheim but I have heard that issue from a lot of people with aqueon heaters if not all .