As I am sure is common, my test kit (Taylor k2006) has me pour the mix of water and regent until the black dot "just disappears." The first time I tested I had a reading of 40. Today, since I've been using trichlor pucks, I decided to test again to ensure I didn't blow over 50 before I transition to the BBB method.
I got a reading under 30. From reading this forum I know that doesn't make any sense given there was no water replacement. So, I must have had a different idea of what "just disappears" last week, than what I think it means today.
What does "just disappears" really mean? If the dot becomes pretty hard to see but still discernible if I squint or focus or close one eye does that count? Or should it be pretty much impossible to see if I look really really hard?
Maybe I am splitting hairs but reading about what seem to be common and almost structural problems with high CYA has got me nervous.