I have read up on Purigen recently and have been quite impressed with all the descriptions and reviews of it. My questions are, is it really what it's talked up to be? I have a decently planted and heavily stocked 125. I'm thinking of filling my fx5 with that and bio media. Would it be a catch all media per say? Is it as effective as carbon? I've heard the purigen doesn't really touch fertilizers, so that's a plus. Any and all advice and info is appreciated!