You want the TF-100 and the XL option. You really can't start the slam without it. The kit you have doesn't test high enough.Grr, okay. Which of the two kits would you suggest? I'll pick one up I guess.
While I wait for the kit, any advice for acid cleaning my filter cartridges and shocking the pool? Should I use the SLAM? Will I have enough time before the July 4 party?
Until you get one you can do a massive water exchange as your CYA is 100+. If it were only 100 then you would need to replace 2/3 of the water to get to a reasonable place to start a SLAM Process
You are lucky, tftestkits.net is based in Raleigh. You may be able to call in the AM and get a kit tomorrow.