Equipment damage normally occurs with very high chlorine levels and/or very low pH level generally associated with the use of 3-Inch white trichloroisocyanurate (or trichloro-s-triazinetrione) tablets ("trichlor" for short).
Trichlor tablets are often added to the skimmer and when the pump is off, the chemical continues to dissolve, filling the plumbing with very highly concentrated chlorine and low pH water. It is also common to see a bleached liner around the skimmer opening in vinyl-lined pools.
The uniquely colored blue 3-Inch Sustain Chlorinating Tablets will not lower the pH and the skimmer dispander will hold any concentrated chlorine solution that might accumulate when the pump is off, thereby safeguarding your pool liner, plumbing and equipment.
(Note: Remember to run your pump for at least 4 hours after adding Energizer Tablets.)
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