My pool store has me using a non chlorine oxidizer to get the baquacil level down before switching to chlorine and changing the sand. The ph is 7.2 total alkalinity 110 calcium 200 Biguanid 2.0. It is 25,000 inground pool with vinyl filter. They said it can take 4 - 6 weeks before we can start using chlorine. They said we can swim in it while using the non chlorine oxidizer. Is there a faster way to convert. Also the deep end is so green you can't see anything. What can I use to get rid of it? Thanks