NaturalSof 6L Water Treatment and Filtration Start Up Guide 

I had an issue with the valve control board. My filter sat for 2 years with water in it. It was never really started up. I’ve finally got around to installing the new board, do I just flush or will I have a problem? It is not a softener just a filter.

my water softwner it's a painter fleck 5800 LXT. the brine tank fill too low of water what can I do to fix that problem?