When opening the pool it was cloudy. I brought up water level with well water going through a filter to remove metals. Then brought up alkalinity and PH. Added some Algicide and shocked it with four 1lb bags of shock. 29,000 gal pool sand filter. I have since shocked it three times since last Saturday. Aldo added a clarifier for 24 hrs (nothing) then added conquest for 24 hrs. Then vacuumed pool and shocked it again with 3 more lbs. still cloudy and min chlorine level. Pool was covered with solid cover all winter.