Janet,
Thank you for your reply and apologies for the delay in my response. Although I did use drops (for the first time) I haven't actually been able to get conclusive hardness readings. I was also able to get local advise to deal with acute problems that arose just as I took over the pool for the winter. (Purple on the walls which has mostly gone away now the more I brush it and a loose skimmer basket.)
To answer your questions as best I can right now.
1) Test tube water for pool only turned slightly pink and never turned blue even after 10 to 12 drops.
2) The fill water I believe is way hard right now because source is temporarily from well water as our canals are being cleaned this month. I tested x 2 and red didn't turn to blue after 20 drops first time or after 10 drops 2nd time. I've decided to retest in mid January and reply again. ( By then I'll have been able to complete my pool chart. Still need to figure volume of my kidney shaped pool.)
3) We float 3" chlorine tabs.
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