Draining 2/3 of your pool, if water is cheap, is a good option. You will dilute all the products that have been tossed in the pool, get your CYA to a manageable level, and reduce your calcium which is fairly high.

If you choose this, coincide it with the arrival of Ben's kit. You're gonna' be amazed at how suddenly accurate and precise you'll be. You will have your water manageable from the start and you'll be able to keep it there.