I am new to the pool. Recently bought a house with a in ground pool. Hired someone to open the pool for this season. Everything was going well until I went on a 4 day vacation and water started to get cloudy. Now I am not able to get it to be crystal clear. I am using 3" puck tablets in floaters. I have two floaters with two tablets each.. Not sure If that's too much. There is some stuff on the bottom of the pool floor that needs to be removed. Polaris robot is not picking it up. Not sure what is wrong with it. I just replaced the reverse valve on it as well. Also using DE filter which hasn't been back-washed since I purchased the house in December. Pressure on the gauge is above 15 PSI. Is that normal? I even try putting the filter in backwash mode and dump out water for about one minute. Water looked clear. Didn't see any dirty water coming out. Do i need to add more DE powder for the filter help clean out the cloudy water? I wanted to maintain the pool myself so I bought 50LB 3" chlorine tablets, vacuum hose, DE powder 200LB (WAY TOO MUCH), TFtestkit TF-100(Don't know how to use it). Also I feel like water level keeps dropping. I try to keep the water level half way up in the skimmer area. But after about two/three days I see water level going down. What can I do about the water level? Is it evaporating or is there a leak?