Has anyone been told to use an enzyme called "pool magic" at closing to prevent algae growth? My neighbor uses it and he said a few pool stores recommend it in addition to algaecide.

I was only planning on shocking with liquid followed by polyquat before I blew out the lines and covered. Any thoughts or experience on using or not using pool magic at closing? Or if I'm using Polyquat is that enough?

FYI I'm using a mesh cover on a 24K gal vinyl pool in ROC NY.

Thanks
Andy