FAQ: I would like to know what type of bleach the directions are referring to for use when regenerating Seachem Purigen®?

The regeneration instructions are specific to using regular 8.25% hypochlorite household bleach (non scented, no dyes). From our research, the dilution of 4 tbsp of Prime® for each 1 cup of water volume will successfully neutralize the amount of 8.25% bleach used in the 1:1 ratio. The directions on your package may say to use 2 tbsp of Prime®. This was based on what used to be the most commonly sold household bleaches which were 6%. This concentration is not sold anymore. By doubling the Prime® dosage, we are accounting for newer 8.25% hypochlorite bleaches while erring heavily on the side of caution. Also, we would not recommend using a splash-less bleach or a 33% more concentrated bleach as these will not be in the proper form or concentration for the regeneration process. We also recommend smelling Purigen® after the regeneration process. If there is a chlorine or bleach smell, repeat the process of soaking in Prime®.