Your most likely right as for me i Use a different Brand but it is floating Plastic is plastic surface area the same or more with different plastic's the whole reason for media to move and churn is to sluff off Bio Waste Keeping the BB Film very thin and healthy the air or Oxy bath to keep those BB's Hungry and thriving!!!!I'm not sure if people are just generalizing k1 and other brands together that are very similar in structure or if everyone is using k1.