I've had a Coral beauty in quarantine for three weeks. It looks good... gills, scales and fins are colorful and pristine. However, as I have it drip acclimating to the display (reef), I notice a cloudy spot on one eye. Doesn't look like velvet or ich... And it has bee three weeks. Can it be an issue due to poor filtration and lack of carbon in the quarantine tank? I did weekly water changes.