OK reporting back on this. Turns out my neigbor is a fan of ahhsome and had some for me to use. Refilled the tub, started it up with Dichlor. Two applications of 5 oz Dichlor and my CYA is already up to 40! Other numbers are FC 17, PH little high at 7.8, ALK 60 CH 60. If I continue to raise CF...