Hi. I have an in ground gunnite pool, cartridge filter we're going to replace all that this year. But in lieu of paying about $400 for opening our pool, besides removing the cover and throwing a bunch of chemicals in (I, of course, will be more methodical and actually test the water etc), what do you need to do when opening? I see a common errors section but no type of checklist or anything...any place you could direct me for that info? Thanks!

Jessica