What makes the recommended shock level so special? Is it not enough to just raise FC to levels to an elevated number not necessarily at shock level?
I ask because I have a slightly cloudy pool after letting it dip below minimum FC levels for a little while. I promptly raised FC to around 15 (shock level is 20) but it seems that 15 is not cutting it. Is that just because once algae takes hold it can grow quicker than sub-shock levels can contain it?
I ask because I have a slightly cloudy pool after letting it dip below minimum FC levels for a little while. I promptly raised FC to around 15 (shock level is 20) but it seems that 15 is not cutting it. Is that just because once algae takes hold it can grow quicker than sub-shock levels can contain it?