Luketendo
BLENNY :O
Well I have brought some new carbon for my filter, bit more expensive than i thought, but it is doing great!
I have seen purigen on the net before and looks very good might have to get some later on, espec as it can be cleaned off and used again! which is fantastic!
Good Luck with this.
Personally I can't remember how I got rid of my tannins. I think I emptied my tank for a different reason and filled it again with fresh water, put the wood pack and the tannins had stopped.