Your TA has come down with the acid additions, grab some baking soda, dilute it in a 5 gallon bucket and then add it to the pool. Costco has good pricing on 13 pound Arm & Hammer bags. Lets try 20 ponds and see what happens. Should get you to around 175 for the TA.
Expect your pH to rise much quicker after doing this and only lower the pH to 7.8. Going any lower will require more baking soda to get the TA back up. Just adding the baking soda will take the pH to 8 so prepare for that as well.
The chlorine level is fine, there really isn't much need to test it right now since the water is so cold and you are using the pucks. Are you still seeing plaster dust? If so, keep the pump running. If not run it 8 hrs a day and pull the pucks from the skimmer and put them in a floater to avoid damaging the equipment.