He is with a BN pleco and a rainbow shark in a planted tank. He is the only fish in any of my tanks that does this, and only when I'm adding water. This is regardless of whether I add it straight from the tap with Prime treating the whole tank, or pretreating a bucket of water and pouring it it. After I'm done he'll hang out in the corner above my circulation pump hiding, then be fine after an hour or so. What the hell is going on? I don't want to keep stressing him out like this.
Video:
http://www.youtube.com/watch?v=_K2HuacWVWc
Video:
http://www.youtube.com/watch?v=_K2HuacWVWc