You're welcome....hope that IS the issue...sure sounds like it.

Test more often and accurately....yes, but shock only when needed.

This forum is somewhat centered around the poolowners' capability to test their own water. The originator sells a kit that is the cadillac of the industry. If you are so inclined, send your folks that really want it to poolsolutions.com to order the kit. It sells for 80.00 and tests accurately for TC up to 5ppm, FC up to 50ppm, and CC. It also tests for pH, Alk, Calcium and CYA.