I bought a Whisper 5 - 15 gal
heater for my 10 gal
Followed the directions perfectly when I installed it. I mounted it on the back side with the suction cups. The water is nicely above the minimum water line. A day after everything is running, whenever the heater comes on ( it has a orange LED
light thing ) it makes a faint chirping noise.
I can hear it from 10 feet away at my computer. It's not over-bearing and kinda faint but its there! So do all these heaters make a little noise? Do you think my fish are irritated? They don't seem to be, but I'm not sure because I'm not too good at reading fishy moods yet.