I need some advice,I have been fighting this stuff on the botton of my pool now for three weeks.Not sure if this is algae or what,however I"m about to pull my hair out,or should I say take the pool down.I have vacuum the pool everyday and the stuff is back the next morning,after I vacuum the pool get very cloudy.I take readings everyday,I have shocked my pool with tons for bleach.in the last three weeks I have used 20 gal of bleach.My arm and right hand is so sore from vacuum I'm to the point of giving up.Here is the pic and my readings today .Also can somene tell me how much bleach to add to shock.I have a 18x33 x4 oval above ground
FC-3.5
CC-0
TC-3.5
pH-7.8
CYA 40