There is cryptocaryon in my marine FOWLR tank and I am just curious if I could save my tank's biology and simultaneously eradicate the disease if I turn it gradually to freshwater and then back to marine, after I transfer the fish to another tank and treat them there. Unfortunately I fall onto a resistant strain of crypto which didn't vanish utilizing the hypo method. Has anyone tried it? Will my filter bacteria survive after I turn it back to marine? Will crypto die? After how long in freshwater? The same goes for other diseases ,like uronema, which seems that I got this too along with the crypto. What about velvet and brooklynella, worms, flukes?