My acid neutralizer is not raising pH as well as it used to

Depending on your water's pH level your neutralizer may be using calcite, ns-mix, neu-cor or ph++ to neutralize water. This media will diminish in volume over time as it raises the pH of the water supply and must be replenished every 3 to 6 months. Also, after many years of service the mineral in the lower part of the tank becomes less effective and it may be advisable to rebed the entire tank to increase the potency of the mineral.