Did you introduce something recently? velvet does not live peacefully in your tank waiting to pop up. Ick can do that and be in a low state of contamination on the fish gill until the fish weaken but not velvet. If you introduced nothing new (fish, coral etc.) within the last month I would exclude marine velvet.
There is no need to treat with copper if it is not velvet as it is easy to keep and maintain an hyposalinity tank. With some liverock the water quality stay top on. I have a hippo tang, a kole tang and a damsel in a 21 gallon for a month now in hyposalinity for ick and they are doing great. No sign of ick for a month so in a week or so I am going to start raising the salinity slowly for a week. Never had a problem with ammonia or nitritres because of the cured liverock. However before doing hyposalinity you must be sure that it is not velvet because once in hypo, the salinity cannot be raised quickly and you cannot use copper with hypo together.
Last edited by daniella3d; 03-24-2011 at 11:57 PM.
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