Those petco air-tube things suck ass, I mean totally - they clog or come out of the grasping things. Get a REAL airstone, it'll be like a stone OR the flexi-tubes work good too. Plus u got root rot off the high temps and your water level's wayyy too low (it's not the flora nova fucking u up), try tossing frozen bottles or ice-packs in there a couple hours after the lights come on. Your water should look like this, all bubbly - two 12" stones on a 2 outlet air pump does the trick on this 5 galloner.