1. Maybe or maybe not. Don't know how long for sure. But, what I can tell you is that with a CYA of 30, you need to shock to 15ppm and try and hold it there without letting it yo-yo up and down. I can't tell from your post if that is what is happening. You need to sustain the high cl reading. As many times a day as you can, test the cl level and each time add enough chlorine to get back to 15. There is no such thing as testing and dosing with chlorine too often when you are fighting algae. The more times and the more often the faster it will clear. For reference-- in a 27K pool, each gallon (4 quarts) of 6% bleach will add 2.2ppm of cl. Run the pump 24/7 and backwash as needed.
2. YES. See above.
3. See #1.
4. No. Shocking to 15 should be sufficient with a CYA of 30. (If you haven't already seen it, look at the Best Guess chart in my signature below. for the connection between CYA and chlorine levels.) You do not have to shock to 10x the CC level.
5. Any form of chlorine is free chlorine which is chlorine which is available to sanitize a pool. Bleach works great at killing algae if you consistently maintain shock level.
6. Yes.
7. See Best Guess Chart.
8. No. Consistent high levels of chlorine are what you need.
One other thing, since you have the K-2005, you can just pick up a K-1515 and you will have the component which is in the K-2006 that allows you to measure high cl. You can pick one up through the Amazon link in my signature below. I suggest that you do so. It will make pool maintenance much easier for you. The dilution method works for a temporary fix but isn't super accurate.
Hope this helps. Welcome to the Pool Forum and thanks for becoming a subscriber.
(I'm not familiar with Fresh & Clear Oxidizing Shock = Potasium Peroxymonosulfate 38%, and how it might be playing into your saga. I'm going to check with Ben about that.)
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