My kuhlis like to dance after water changes, is this normal? I always heard this is a sign of stress. Sometimes they dance in the bubbles, though at night, and its in circles, and the peppers and dojos and corys will even participate.
I have footage of my 7-8'' pleco chillin up side down in the bubbles for half an hour. We had a little tile house at first with bubbles in it, He would crawl in there and hover over the bubbles so they broke on his belly, and favoring mostly his under arms, would then look up in pleasure.
He is silly, about 9 years old now, we got him from a friend who had a 20g tank, and they wanted a new smaller pleco. He was so big in there all he could do was turn from one side to the other. But he is too big for my tank really (or will get too big, already grown 1.5'' since I got him last year), I like him, but if anyone wants him, you can have him.