I went to step into my tub to take measurements of the wall behind it. As I stepped in, I heard water underneath. I could always feel a slump under the tub (towards the center of the tub), but never heard any water before. I'm concerned that water may be sitting under my tub and causing the slump. Is there something I can do with the stopper to help stop the water from settling? I took off the stopper to see if I can see a leak. No leak... I could only see where the water is supposed to go once drained, and that direction is the opposite of where the water is settling. Help!

- MuddTaylor