had 1ppm change overnight.. water did not turn pink (CC's) but the water is blue but I can just barley see the bottom. It is very cloudy like it needs a clarifier. My questions is is clear meaning totally clear or might this be all the dead algea. I just repalced my cartridge so I was hoping that will help. Continue to shock untill I can see the bottom clearly. Will clarifier help or waste of money.