I started using the TFPC method this spring when I replaced our liner, and had a fresh fill. I noticed late last weekago my pool was getting a bit cloudy. I had recently change my pump time from 18 hours a day down to 6 hours, and attributed the cloudiness to not having my filter on long enough which was probably a rookie mistake. During this time I also let my FC drop to 2 ppm a couple of hot days in a row, basically because I was riding the lower range of my FC. A few days ago I noticed a bit of green on the deep end slope of the pool, but couldn't tell at the time if it was algae or a reflection because it was windy that day. I continued to keep the FC between 3 and 5 and the CC was always at 0.
I had to go a way a few days and had my wife add the required amount of bleach to keep it in the range. Today I returned to a fine layer of green on my liner, and am assuming it is algae. Here are my test numbers when I returned.
I pretty sure I need to do a SLAM even thought my CC is 0 because I have visible algae, but want to check before I proceeded. I am lowering my pH now to get it in slamming range in anticipation of beginning a SLAM and have the robot out cleaning.
Please help as I have never done a slam, nor have the experience to know I need to do one.