| Increasing water flow helps tons. I'd be hesitant to add a chemical to remove it, since once a tank matures and stabilizes it usually goes away on its own. Marycin 2 will kill it, but like any antibiotic, it will disturb the eco-system for a long time. If it were my tank, I'd remove all I can manually, add a powerhead or two, and do a very large water change. You might find it doesn't come back in force at all. | 
