Yeah, I think I'd be a wee bit nervous if I heard thumping from the skimmer! "I need an old priest and a young priest. The power of Christ compels you!"

As for the Chlorine usage... the pool walls felt fine (I checked for that too). Still, I shocked it again and the next day it dropped back down to about 1.5-2ppm again.

Yesterday I picked up some replacement CYA test chemicals and my CYA level was far below 30. I dumped some more stabilizer in and I raised my CL to 4ppm. I'll test again tonight and see where everything stands.

We've already been swimming since the mouse "incident"... I'm glad it didn't freak out my wife too much. Thank goodness she didn't find it. She found our first frog and came running into the house yelling that there was an animal in the pool! I was expecting to find a dead raccoon or something...