A bit of success today, FC is at 20.5 after 14 hours from 22. No need to add more shock I assume, still brushing up dried powder from corners though
What is your clean pressure after backwash?I have a sand filter, pressure seems stable (20), it has never gone above 20
Does your pump run really high speed? Mine tends to run at 8-10 in my normal low speed operation.20, same as before