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Also can someone explain how fish develop an immunity to velvet? I find this part fascinating. I lost all my fish bar a sailfin- who was covered in it but still seemingly fine and my small maroon clownfish- male. The female mate died or a secondary infection. Does it mean with parasite management, that they can hold off a small population with their immnity or are they full immune? The clownfish in particular was completely unaffected and I know that they have rougher slime coats- but the female did get velvet and perish due to a secondary infection.
Does immunity mean always immune or partial?
Does immunity mean always immune or partial?