I had my tank ran fallow since March 5th and added 5 black mollies on May 16 after going fallow for 74 days. It is only the 5th day of the black molly test. I lost one of the molly during my time away and had no idea when or how it died. The rest of the mollies appears to be clear of any disease and is health and eating. Since the dead molly has been stripped to its bones so there is no way of telling how it died. I am leaving for 3 weeks vacation on June 9th so I don’t know how to proceed. Can the molly died of velvet or Brook within day 5 of introduction while 4 others show no symptoms?