Intex 12x24 pool up. Added water from delivery svc yesterday. Have not hooked up sand filter and swg yet. Have been reading chemistry 101/pool school etc. Threw out shock treatment water guy left me after reading here. Ordering tf100. Picking up sand today, assume pool sand is pool sand. Question is what should I do in the mean time, cool and rainy yesterday at delivery, sunny this am. Should I do any treatment, bleach? Should I put cover on until I'm more prepared to avoid the sun?