Hello,
Thank you for the complements. Purigen is a resin that
will remove organic waste compounds - that is, it will
focus on a broad range of organic compounds with focus
toward nitrogenous waste. Purigen can be
recharged about 7-8 times before it is exhausted, but that
is also dependent on the organic load in each individual
tank. Purigen turns a brown color when exhausted in the
tank, but again the exhaustion rate depends on the number
of livestock and how much waste is produced. Here is a
link to Purigen and at the bottom of that page there is
FAQ also;
http://www.seachem.com/products/product_pages/Purigen.html.
Seachem Support
10202
Tech Support
