hi guys need a bit more advice. ive had some BGA problems for a bit now. i think through process of elimination ive worked out the problem was the kno3 i was using. i got some from a sponsor at the weekend and its yellow and smells, the ebay i had was white and didn't smell. so now im dosing the right stuff will the BGA go away with time or do i need a black out? i don't mind putting up with it for a few weeks if it will just go away. i do a 60% water change at the weekend and ive been removing the algae twice during the week, with a very small water change. thanks guys