Boyd's Chemi-Pure Ion Filter Medium

Chemi-Pure is the original ion filter medium constantly improved over the years. Chemi-Pure is a revolutionary departure from the old mechanical filtration principle of galls wool, etc.

It is a precise formula for use with either artificial or real sea water or fresh water as a chemical absorption filter, ion generator and exchange unit, which positively keeps pH at a perfect constant level. This ionic media acts mechanically as well as chemically, absorbing all the various elements of decomposition.

The resin produces negatively charged ions, while removing excess acids and ammonia. Use 1 unit for up to 40 gallons of tank water, 2 units from 40 to 100 gallons, above 100 gallons add one unit for every 25 gals. 10 ounce full unit in a sealed nylon filter bag.