Pool Opening Problems.

[PoolDoc]

1. Backwash your filter.
2. Return to normal operation. Note clean filter pressure.
3. Add 4 - 5 quarts of DE to your skimmer. Check the pool for leakage. Check the filter for pressure increase -- it should increase.
4. Wait 24 hours -- pressure should have increased more. Let me know.

4 quarts of DE is enough to turn your sand filter into a tiny DE filter that should stop up quickly. If it does NOT stop up, and DOES not leak into the pool, THEN the problem is that some of the particles are really nasty small.