Increased flow also helps, as does a good skimmer. I have it in my new setup but don't worry too much about it as I know it will go away in a few weeks. While ugly, it usually goes away on its own. Potassium permanganate and ozone can also help, but you must be very careful with both of these options. Siphoning it out will also help but it generally comes back in less than 24 hours. Patience, grasshopper, is the key.