When I turn the filter on for my betta's tank, it has recently in the past 2 days started to foam/bubble at the top, and Im not sure why. This is day three that Im doing the fish in cycle. It did not bubble at the beginning but this is day 3, and I am concerned. I don't know if the layer of bubbles are blocking my betta from getting the air when he comes up to breath? It sometimes appears as if he likes the bubbles, and then sometimes it appears as if he doesn't like them. I don't know. I ordered the Red Sea Deco nano aquarium filter, that is supposed to be really good, as opposed to the UGF that my tank currently came with. Should I be concerned about the bubbles, or do you think it has something to do with the good bacteria that are hopeflly starting to grow in my tank?