Hi all, I found this sort of "cookie" like puck in the pool pump filter basket (the one just before the pump. It was in one piece about the size of a sandwich cookie. It has a smooth consistency, broke up pretty easy, and isn't real gritty. I'm wondering if this is baking soda that for some reason congealed together in the basket. Or could it be something else like my pool finish or something? It's the first time I've noticed such a thing. When I add baking soda, I distribute it then use my wall whale brush to try and dissolve it. My pool runs a Kreepy Krauly sandshark cleaner most of the time with the skimmer on and main drains off.
If it's baking soda, is there a better way to add? I last added a large box as my TA was at 50. Any thoughts are appreciated.

If it's baking soda, is there a better way to add? I last added a large box as my TA was at 50. Any thoughts are appreciated.
