My pool boy is coming to close my inground pool tomorrow. He recommends that I put an algaecide into my pool even though my water temperature is 61 degrees because we tend to have mild winters. He recommends a copper based algaecide but I told him I'd rather use polyquat since it is nonstaining. I've been reading about polyquat on here and it concerns me to use it because it has to be applied when chlorine levels are normal and it can reduce chlorine levels after it is added to the water. I also read that there is no need to add more chlorine if it goes down after adding it, and it can reduce chlorine levels further a day or two later. If I add it to my pool tonight at my normal chlorine level and it lowers my chlorine level down to 1 ppm or even 0 ppm a day later after my pool is already covered and closed, is it going to protect my pool from algae the rest of the fall, winter, and early spring? If I tested my water after closing and found that the chlorine level is 0 or really low, I don't have an easy way of adding more chlorine or algaecide since I don't own a pump.
I also need to know the best way to add the polyquat to my pool and the dosage. I'm going to have to vacuum my pool and backwash right before closing since leaves are constantly dropping into my pool, so I need to know if I need to add a little bit extra since I will be losing some of it to backwashing. I also need to know what the PH needs to be before it is added since I probably have a PH of 7.8 right now.
I also need to know the best way to add the polyquat to my pool and the dosage. I'm going to have to vacuum my pool and backwash right before closing since leaves are constantly dropping into my pool, so I need to know if I need to add a little bit extra since I will be losing some of it to backwashing. I also need to know what the PH needs to be before it is added since I probably have a PH of 7.8 right now.