So I recently bought a Kanger Aerotank Mini and soon after ordered a regular Aerotank as well. The first thing I noticed was the solid metal parts and the nice weight to it (love that) then I filled it up with juice and gave it a minute to soak. The very first moment I turn it on I hear crackling, and it starts every time I turn it on. There's never any leaks and I never taste my juice so it's not that, but both tanks do that and I wondered if that's totally normal. I've checked online and there's plenty of people who hate it and some reviews where they talk about how nice it is. I kinda like it, just wondered if this is what it should be doing.