Increase in Filter Back Pressure

Cause Immediate Corrective Action Preventive Follow-up
Filter needs to be backwashed Backwash the filter according to the manufacturer's instructions. Adjust pH to 7.2 before adding Sustain Shield Energizer Tablets.*
High pH and/or TA Adjust pH and TA to proper levels.  

*Note: Filter pressure may increase with the addition of Sustain ¾-inch Shield Energizer Tablets. To avoid this, adjust your pH to 7.2 before adding tablets to your skimmer. Do not backwash immediately after adding Sustain Shield Energizer Tablets.