Thanks all. I was getting ready to post the exact same question. The OP's words in everyone of his posts (except the air leak) sound exactly like my situation. The pool is sparking clear but I have the crud he describes on the bottom every morning. We have a lot of iron in our water (well). Back to it I guess....DHS is going the think I'm a terrorist what with all the chlorine I buy. Just to let you know that you're helping more than just the OP.
On edit: just looked at the pix. My crud is not green like his...mine looks more black. It does poof a little.
On edit: just looked at the pix. My crud is not green like his...mine looks more black. It does poof a little.