Hi,

I have a 27 round above ground pool. The preesure seems to be really good but for some reason, when I connect my auto vacuum to the skimmer, it works for like 2-3 mins and then stops. Now I noticed that unless i have a basket or a chlorine ball in the skimmer, I get a tornado effect. Not sure why this is happen and if that's whats causing the issue. Some more info on the pool: I have a sand filter, and have had the pool for about 5 years now and have NEVER changed the original sand. the pressure, when the basket or chlorine ball are in the skimmer is consistently between 12-15 psi. Any suggestions? Thanks