1.If you have 4-7 Days to prepare for the closure, consider dosing with stain & scale inhibitor and phosphate remover. Backwash as need over period.
2.Should you be operating in crisis mode and need to close immediately, skip step 1
4.Daily/ Weekly - visual inspections to determine level of clarity if possible
5.Weekly (more if possible) - test water for pH and Chlorine readings
6.As needed, add Acid manually to pool by walking and pouring evenly all around the pool or spa - do not pour in one spot. Try to keep pH close to 7.5
7.As needed, add granular (Cal Hypo) or liquid chlorine by broadcasting or pouring around the pool or spa evenly. Try to keep Chlorine PPM at 1.5 or 2.0 ppm if possible for Covid-19 treatment
8.Wait at least 30 minutes and brush pool to mix or distribute chemicals to all portions of the pool or spa
(Please note, this is considered an approach during crisis periods and it not recommended for standard care)