Rinse before use. Each 100ml treats 400L (100 US gallons) for 3 months. For most effective use, NY Purity should be placed in a filter so as to maximize the flow of water through it. Exhaustion is indicated by a pronounced discoloration of the media to dark brown or black.
Soak in a 1:1 bleach:water solution or for 24 hours in a non-metallic container in a well ventilated area and away from children. Use regular 8.25% hypochlorite household bleach (non-scented, no dyes, do not use a splash-less bleach). Rinse it thoroughly by water. Original color and full activity should now be restored and NY Purity is ready for reuse.
Caution: some slime coat products may permanently foul NY Purity and render regeneration difficult. Do not reuse if odor of bleach/chlorine is detectable. In case of doubt, soak it in small quantity of water and test for residual chlorine with a chlorine test kit.