Rinse pouch under tap water. Place pouch in path of water flow in the aquarium filter. Activity of the pillow lasts 48 hours. After 48 hours, recharging is necessary. To recharge: dissolve 3 tbsp. of API AQUARIUM SALT in 7 oz. of tap water. Rinse pouch in tap water, then soak in salt solution for 2 hours. Place back in filter. When not in use, store pouch in recharging solution; do not let pillow dry out. Replace when pillow ceases to function properly after recharging

• Is the API WATER SOFTENER PILLOW rechargeable? How is it recharged?

API WATER SOFTENER PILLOW can be reused many times before purchase of a new one is necessary. When its effectiveness begins to lessen, dissolve 3 tablespoons of aquarium salt in 7 oz. of tap water. Rinse the pouch in this tap water, then soak it in salt solution for 2 hours. Place back in the filter as is – there is no need to rinse it. When not in use, store the API WATER SOFTENER PILLOW in recharging solution. Do not let it dry out. Replace your API WATER SOFTENER PILLOW when it ceases to function properly after recharging.

• How do I know when API WATER SOFTENER PILLOW needs to be replaced?

API WATER SOFTENER PILLOW can be recharged and re-used up to 4 times.