The pool appears to be circulating normally, but air bubbles constantly return to the pool, through one or all jets. Why? If I just leave it, will I have a problem?

Again, first check the water level in the pool. Raising the water level may correct the problem. However, if the water level is correct and you are still having air returned to the pool, you may have a leak in the suction line between the pool and the filter. Left unchecked, air traveling through the system can dislodge dirt trapped in the filter and cause other problems such cloudy water in the pool. Call us for assistance.