Im running mine for 2 weeks in a TLF reactor at the moment. Until I read this thread today I was only using a MJ400 and had little flow and the pellets were all clumped together with no tumbling at all
Just threw on a MJ1200 and now they are rolling like dice! looks cool to boot lol Ill update if I notice and changes with my system. Lately Ive been fighting cyano since I upgraded my lighting system.