gresta46001 here. New to this forum, and obviously have a problem with my pool.
21,000 gal, IG Vinyl, DE Filter, 1HP 11/2 inch pump, Hayward filter (size unknown).
The filter has a Hayward Vari Flow valve on it.
When I am vacuuming the pool, it works well for about 5 or 10 minutes, then the...