Potable Aqua Water Purification Tablets. ... Order ONLINE Today. 100-ct. Potable Aqua Water Purification Tablets Germicidal Tablets that act fast, ready in just 30 mins. Proven effective against giardia lamblia (not cryptosporidium). Iodine based, no chlorine. 2 Tablets treat 1 qt. 100-ct. Potable Aqua Water PurificationTablets with PA+Plus Same as above, but with PA+Plus ingredient that neutralizes to improve water taste and color. 40-ct. Potable Aqua Chlorine DioxideWater Purification Tablets The Chlorine Dioxide is proven against viruses, bacteria and cysts including giardia and cryptosporidium. Meets EPA microbiological purifier standards. 4-hr. treatment time. 1 Tablet treats 1 qt. water. 120-ct. Potable Aqua Chlorine DioxideWater Purification TabletsSame as above.