Includes:

• Polyproplylene grid pad for large potassium permanganate tanks 18" diameter
• Replacement pad for Potassium Permananate Feeder tanks that are 18" diameter;

Specifications:

• Replace every 1 - 3 years for best results.
• In some cases these pads can be cleaned with citric acid or vinegar, or it can be replaced.
• 18" in Diameter