Yes, I have read that this is probably a bubble nest, and is in fact a good thing, but from what I understand.. I thought the nest would only be in a specific place in the tank, Ziggy's bubbles are everywhere! So as I was researching, I read that it could be protein buildup or something.. so I did a water change, but the bubbles are back! Am I just over reacting and it really is a bubble nest and he's fine and healthy? I have him in a 2 or 2.5 gallon tank with a filter.