I know what you mean that's how I was with the og pioneer half the time.Bone dry and gurgle free again this morning. All is well. I'll put the leak down to a bad build.
The only problem I'm finding with this tank now is that you can't tell the difference between a good build and a bad one until you've filled it and left it a day, meaning you're always feeling that you're playing a bit of a lottery.
Other than that, it's exceptional.