You don't list a pH level, so I can't advise you on that--but it seems odd to me that you've added muriatic and now you are adding Borax? What is the current level?

To clear up your pool you're going to need to run your chlorine up to 20 ppm and hold it there until the pool clears up and until you can go from sundown one night to sunup the next morning without losing any chlorine.