I've been fighting algae the past two weeks and realized the last day or two that I haven't been patient enough to let the chemicals work. I got some liquid shock and playing with an online calculator I put enough in to get the chlorine to 30 PPM. I know normal shocking target is 10 PPM, so assuming the liner isn't getting bleached out, am I wasting it? I figured I'd account for it killing algae and some sun loss today before I can test tonight and add more if I need to.