how long after an angelfish has velvet disease color go away?
Click image to enlarge. Freshwater Velvet Life Cycle. Another difference between freshwater velvet disease and freshwater ich is the tendency of the velvet parasites to infect the gill membranes of the fish before the skin or fins.uarantining new aquarium livestock for 2 to 3 weeks will keep freshwater velvet infections out of established community fish aquariums. Because aquarium fish can acquire some degree of immunity to Piscinoodinium, healthy aquarium fish may fend off freshwater velvet disease for years without any help from the aquarist.