After having used Purigen 100% for the last three months, I'm also all about it!
I previously used Marineland BlackDiamond AC
, and rotated out one of the two large bags in my HOB
every other week. I now use two bags (100ml?) of Purigen and plan on rotating them out every 10-12 weeks. Rotated out one already. I've seen no major improvement over the AC
, except that I seem to have less surface scum. (Granted... I had 0 ammonia/nitrites/nitrates with AC
, so there's not much to improve on there!) BUT... I'm a little happier to know that I only have to mess with it every 3 months versus every 2 weeks, it can be regenerated, and it supposedly doesn't rob my tank of any trace elements as AC