"Puri-Cal C" Neutralizer Filter Media -- .5 cu. ft. Calcium Carbonate Media Can be applied to most

Can be applied to most media tank sizes

Each filter has 3/8" push lock connections on both ends

It is supplied in the sodium form as black colored beads

Chlorine/Iodine

"Puri-Cal C" Neutralizer Filter Media -- .5 cu. ft. Calcium Carbonate Media Can be applied to mostGranular, white, 100% calcium carbonate filter media for pH correction also known as "calcite". Prevents blue green stains and corrosion of copper plumbing in water with acidic pH levels. Can be used in upflow or downflow (backwashing) filter tanks. Sacrificial to water with pH below 7. 0 Will not raise pH above 7. 2 Not for use in water with a pH below 5. 8 Must be replenished about every 6 12 months, depending upon your pH level and water usage.