Is my PV supposed to be making a crackling sound when I'm using it? One of my tanks doesn't make the sound but 3 others do. Normal or no? Noobie here by the way, in case you couldn't tell 
It's my first one, got it @ Xmas and it's an Ego-K if the brand name makes a difference.
Thanks
It's my first one, got it @ Xmas and it's an Ego-K if the brand name makes a difference.
Thanks