Tested the water this morning, a day after maintenance. Nitrates lower, around 40ppm. I'd rather have it at 20. Pretty sure now the distrubance I made caused this, caused the algae that's showing up. Maybe even caused Pinkie's injury- he has two or three torn scales on his side. He seems to be chasing the barbs more. Perhaps feeling territorial after I moved stuff around. Or being curious, exploring the changed space, ran himself up against the filter intake again.