Just thought id say thanks to everyone that replied. Also im pretty sure the parasite did not just appear or come on any of the fish I had. Im almost 100% that this came on a piece of live rock that I purchased. I recently saw the system the rock came from and the fish are showing signs of velvet. This goes to show that once its been introduced into a system everything is contaminated!!!!!!! So i gues in conclusion pay extra close attention when buying stuff to stock your tank. I would suggest doing a coral dip on live rock when your adding new pieces to a already established tank or a freshwater dip. thoughts?