I'm a super-newbie at pool maintenance, having inherited a pool at a house I recently purchased. The water is crystal-clear, but the test done at Leslie's states that:

My alkalinity is zero
My PH is 6.0
My copper is "3+"

Earlier this year, maybe 4 weeks ago, alkalinity was 100, PH was 7.0, and copper was .5 -- what on earth happened? What can I do to fix this? I do have a heater, so is that it? Again, the water is clear, no staining, etc. I'd really like to not drain the pool, unset the liner, and have to have someone out to fix it.

Please help me...