1. As Watermom told you, stop worrying about nitrates and phosphates. They are NEVER 'the' problem. Sometimes they might contribute to 'the' problem, but if everything else is right, you probably won't have any problems with either nitrates or phosphates.

2. Stop using diluted chlorine products: compare by CHLORINE content, not chemical compound. Undiluted cal hypo will have a CHLORINE level of 65 - 75%. Pure dichlor will have a CHLORINE content of 55% - 62%; pure trichlor will have a CHLORINE content of ~88 - 90%

3. Compare bleach and liquid chlorine by comparing CHLORINE %; sodium hypochlorite (bleach) solutions of more than 9% can RAPIDLY deteriorate, if not fresh or if not kept cool.

4. If you have access to a Sams Club, they sell pure dichlor in a 24# box of bags or a 50# bucket of powder at an excellent price. Since you are low on CYA, and since dichlor adds BOTH chlorine and CYA, this would be a good option for you, for now. Do NOT buy from Walmat, Kmart, Costco, Lowes or Home Depot. When I last checked, those stores ALL sold diluted dichlor.

5. Get your K2006 and report levels ASAP.

6. Meanwhile use borax and muriatic acid (link in my signature) to keep pH between 7.2 and 7.8.

7. Do NOT worry about alkalinity or hardness -- do NOT add chemicals to adjust those.