[Argus]

I soaked Mopani from Doctors Foster and Smith for weeks, then boiled it, and soaked it for a few days. It still discolored the aquarium water for months. Eventually, I added a bag of Purigen to my filter and the water cleared up. Purigen was saturated (turned dark brown). I've rejuvenated it, but not put it back in the filter yet. Water is still fairly clear.