Thanks to the fine folks here at TFP, I have kept a close eye on my steps and sure enough I think there is some algae behind one of the sets. I have three sets of wedding cake steps in the pool, all about 3 inches from the wall. I did the ping pong ball test to watch my water flow on the surface and it really seems to weaken by the time it gets to the third set (the furthest from the one return). It seems that the flow must be weak underneath the surface as well. I've been pouring my chlorine in the area where the algae spot is located and thanks to another tip I am going to get one of those whale brushes to hopefully help push the chlorine behind the steps after I pour it in. My problem is that can't get to the algae spot to brush it because it is behind the step and my brush won't fit behind there at the correct angle to brush the algae away unless I get in the pool. We have had thunderstorms on and off and my water temperature is too cold for me to brave getting in. Is the algae going to just sit there and get worse until it gets brushed? I brought my pool up to shock level this morning but then it dropped 5 ppm by this afternoon so that can't be good. Maybe there is a lot more algae that is hidden by the steps? My chlorine numbers this morning then this afternoon:
FC 16 11
CC 0 0
TC 16 11
My CYA is about 30 now. We've just had so much rain. I've bought some of the liquid pool conditioner to add to my water. I'm just trying to mix in the elmer's glue that is stuck in the bottom first! Thanks in advance for your advice!