I ordered a Hayward DE pro-grid 36 and plan on installing it myself later this week. The pool is currently closed. I was wondering if I can install the new filter first and then open it or if I need to open it with the old filter, get it reasonably clean and then install the new filter.
One of the things that concerns me is that the manual says to add the DE through the skimmer initially. That kind of means I'll be adding it along with dirty green water.
I tried checking out some YouTube vids but in every tutorial about changing a filter the water is already sparkling.
I'd rather install the new filter before opening if possible.