PoolDoc, just wanted to follow up with you and give you an update. I’m almost cleared up enough to do the bath test. Can’t locate liquid 10% bleach locally so will have to use the regular 6 or so percent and figure out the proper dilution knowing it shouldn’t have any additives. On a good note, I have a “construction line” under the pool which was installed for the purpose of removing any water under the pool should I need to drain it. This was a pleasant discovery.

Bill