Increase in Filter Back Pressure | Sustain Pool Chemicals

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.