I bought the TF-100 test kit and have been testing for a couple weeks. Here are my results.
PH 8.2. (The best I can tell by matching colors)
( filters are only 3 months old, and we're just cleaned 2 weeks ago)
All Algae went away after I replaced filter cartridges 3Attachment 44231 months ago. Now I am seeing Algae. I haven't added any chlorine (tab or bleach) for 2 weeks. FC is still 8.5. According to FC/CYA chart I should bring FC upto shock level of 35 (I am in the Asterick range on the chart) Is this correct? I know my CYA is high and I need to lower my Ph before I Slam, but 35 seems so really high. FYI, we are planning to go with pebble tech in a couple months, that is why I haven't drained pool to lower CYA.
Pool water is otherwise clear...just seeing green Algae on some stairs, and in the attached spa.
your expert advice is much appreciated.
PS...can't figure out how to place picture at bottom of post.