Apologies, I thought I mentioned the steps as part of the history and even went back to check but it's not there. I guess when we shocked Sunday and then the test came back free of algae Monday I thought it was a non-issue. I brushed and vacuumed the spot obsessively on Sunday after shocking.
Once we got the steps out, I saw that was probably the issue all along but I really thought it was a non-issue once we got them out Sunday. In any case, hopefully this will help. I'm so ready for the kit to come in. I keep checking the tracking hoping it magically comes tomorrow. Is there anything at Walmart we can get that will measure just the chlorine? My liquid kit only goes up to 5.