Hello everyone, I recently redecorated my 90g tank and added 3 large pieces of mopani wood. They've discolored my water significantly... And although my South American cichlids are enjoying the tannins, I am not. I added a bag of activated carbon to the filter a few days ago and it hasn't cleared up much, so I'm thinking about trying a bag of Purigen instead. The reviews seem really great. Any opinions or advice on the stuff? I normally don't even run carbon in my tanks, I'm chemical filtration-illiterate, if you will. Thanks in advance!