hey there! I just noticed that one of my little oyster decorations stopped bubbling air from it, I hcekc my air pump and it works fine and there is no kinks in it so I have no clue what the problem is. I still have my flter on that ut water back in the tank that has aleration, and I also have one of those blue attachments that air comes out of in lots of little bubbles. Is that enough for my fish? I have a 20 Gallon with 4 Mollies adults, 4 fry, pleco and a cory. Let me know please!