Help!!!please double check my sugestion to my neighbor on there pool..Inground vinyl..sand filter..check'd there water result's..ph=7.2...fc=7.5....cc=.5...Tc=8.0...alk=170...calcium hardness=170..Cya +100...The pool store test was 130..which they said was normal....Water is cloudy&green tent still..they have been fighting this sincelast week ..add'd what the pool people said to add....I told them that they were going to have to drain atleast 1/2 of water and replace with fresh.....I'm I right on that??? tring to get them straighten'd out and on the BBB method...