I was desperate for a crystal blue book so I used this HTH Shocking system that contains a 2 step process of pouring granulated shock and brown flocculent. All the algae sunk to the bottom of my pool and the pool looked clear. But as soon as I attempted to vacuum through my cartridge filter it ruined my pool. I’ve tested the water and the levels are where they should be but my pool is still green. I’ve tried everything and nothing has worked. Anyone else get this shocking system and had success with getting it out of pool without draining?