You can add a little bit of DE to the sand filter to help speed up the clearing of dead algae from the pool, follow this article, Pool School - Add DE to a Sand Filter.
You have to watch the filter closely at first to see how fast the pressure rises and when 25% above the clean pressure you backwash and add more DE.
Hello , This thread has been inactive for over 60 days. New postings here are unlikely to be seen or responded to by other members. For better visibility, consider Starting A New Thread.
Welcome to TFP! For a wealth of pool care information please check out our free Pool School. If you are in need of specific help then we encourage you to Register and ask us here in the forum!