It also provides a large surface area for nitrifying bacteria in recirculation systems and can be used as a filter bed.

Can be recharged several times overnight immersion in a salt solution (NaCl) or drying in an oven.
Usage: Use 1 gram zeolite for every 1.5 mg of ammonia to be removed. For example, to remove 1 mg/l ammonia from 100 litters of water, use more than 65 grams zeolite (100 / 1.5 = 65 gram)
For fresh water only (not effective in salt water).