Cryptosporidium is a protozoa that can be present in water, such as the water that you drink in your own homes, and can cause diarrhea and gastric problems in both humans and reptiles. Most water systems do not filter for cryptosporidium and it can be present in your tap water. In humans, the symptoms are similar to food poisoning.
The most advised method of killing cryptosporidium in an enclosure or on equipment and tank furnishings is immersion in undiluted ammonia for 20 - 30 minutes. Spray undiluted ammonia on all surfaces of the reptile enclosure (with the reptile removed, of course) and leave the ammonia to dry for 30 minutes, rinsing well afterwards.
The most advised method of killing cryptosporidium in an enclosure or on equipment and tank furnishings is immersion in undiluted ammonia for 20 - 30 minutes. Spray undiluted ammonia on all surfaces of the reptile enclosure (with the reptile removed, of course) and leave the ammonia to dry for 30 minutes, rinsing well afterwards.