So a little background: My cat shark had been acting odd as of recently. She was continuously yawning, had rapid breathing, and came out very seldome. I checked her to see if there was anything visibly wrong with her (cuts, rashes, etc..). After striking out, I check the water parameters PH 8.2, Ammonia 0ppm, Nitrite 0ppm, Nitrates 2.5ppm, Copper 0, Phosphate 0.5. I was kind of stumped at this point, until I noticed my sailfin tang was visibly stressed with no apparent cause other than the possibility it was from my yellow tang. The final thing I check was if something was acting up in my equipment. I did measure 9vAC (2v from the skimmer motor and 7v from the main pump) of stray voltage with my DMM. So I ordered and placed a ground probe in the sump. The result was almost instant. My shark came out of the rocks, swam around the tank, and even laid on the sand long enough for me to get a couple of pictures. Her breathing slowed down and she stopped yawning. In addition, she was seemed more vigorous in her eating tonight.
