vinyl liner, cartridge filter. using 12% liquid. have not shocked in a while, testing a a lot, keeping fc between 6-9 with little difficulty. ph has been stable. not using well water to top off. have been using a sam's club algecide. maybe 1/2 g a week
have not noticed typical algae symptoms of sliminess. might be little higher on phosphates, but that's only based on store input, using 3 caps week of the usual brand. thanks for the help. baron.