pH is an indicator of the acid or alkaline condition of water. The pH scale ranges from 0-14; 7 indicates the theoretical neutral point. Neutralization cartridges act on acidic waters by slowly dissolving the calcium carbonate and magnesium oxide media as the water flows through the filter, raising the pH of the water and increasing the alkalinity. This eliminates the effects of corrosive water and can help to prevent corrosion of piping and fixtures. Aries pH Neutralization cartridges contain a unique blend of Calcite® and Corosex®. The unique combination of media ensure pH correction over a wider range thereby ensuring a more consistently balanced effluent thereby lessening the effects of acidic water and preventing corrosion of piping and fixtures without the negative impact of over correction. Sized to fit standard Slim and BB housings.