My 10 gal and now my 20 gal both make the same weird creaking /crackling sounds. It’s very, very quiet. I can only hear it when I put my ear very close to the bottom of the tank. Does anyone else hear the same thing or know what it’s from? I wish I could get a video. I might try. But it’s so quiet I doubt it’ll be caught on my phone. I know my 10 gal didn’t leak because of this sound (it leaked because of the stand swelling underneath it, it was making this sound for months before I put it on the bad stand) so I don’t think the glass is breaking or anything, but I’d really like to know what it’s from.