Thanks, Ben.

The metal had stained the bottom of the spa. I realize now, that my entire system was out of whack... hence the ' Yuck' spa... i.e., algae stains... yellow, green, and some black. So I am in the process of getting things back up to "balance". Did soak stain overnight with 'tri-chlor in wet sock' ... helped. Scrubbed more today.. Sump Pumped out extra water. Now refilling. It is looking much better.

Question: Do you have any recommendations for a SWCG tester? Can't seem to get into the other boards right now to read up on current info.

Thanks again,
Karin