I am confused. I read this whilst doing a search on here relating to Purigen Postby Maximumbob Â» Sat Oct 20, 2007 3:05 pm I have just attempted to 'recharge' my Purigen. Its seems I misunderstood the advice given - i assumed you only needed an non-amine based water conditioner during the recharge phase.. I have been using Nutrafin Aquaplus water conditioner. It apparently (after much internet searching) contains an amine based product which has fouled my purigen. I first suspected something when I attempted to soak it in a bleach solution and the colour change was minimal. It only changed back to normal after a prolonged soak in 1:1 bleach water solution The moral of my story is... learn from my mistake, if you use purigen, switch to seachem prime water conditioner. It will make your life easier! I also did a search on Hagen's site in FAQ's and they say that Aquaplus is not Amine based. Is it or is it not? Anyone know? I have always used Aquaplus and have recently bought a 2 litre pack of it so do not want to change to anything else, but I do want to give Purigen a try.