If my calcium in normal should i just go to using bleach? if so, please direct me. also, stopped at this other pool store today on my way to work to check out their prices on sequestering agents. I did not spend any money this time. How long do you think i should wait before i try another sequesterant if the water doesn't clear? they had this 1/2 hp sand filter made for intex pools for $239. do you think that would be worth the investment if i ever get this water under control? Patience, what is that, lol.