Went to the pool store and bought 5 new test chemicals (first time EVER they had stuff in stock) and a pump filter basket gasket which ran $43. They had Alk Up or whatever they called it for $40 for 30# and $60 for 50#. So I bought 4 12lb bags of Arm and Hammer for $25 at Sam's. Gonna dump two now and test later today.

The internet told me to just dump in in the deep end, so I'll split the difference and do one there and one in the skimmer. Will do another full round of testing later.