+1 to what everyone said, @melypr1985 @Humblefish . I didn't want to do it, but I had to pull all the rock and I saved some fish. If it's velvet, you really don't have time to waste, the fish will start dying very quickly. Just take the rock out, catch your fish, put in QT with copper and test the levels of it with a good test kit. Salifert makes a good Cu test kit. Keep your fish in QT for 76 days like the thread says. Acriflavin is a great way to get your fish back on track to health since it'll help heal the tiny wounds left by ich or velvet. Either way, just get the fish out while you can and get them into treatment. There are upsides to running fallow. You get to rescape, you'll probably build a nice population of pods, you can focus on your coral in that tank. Keep thinking positively and you will be fine as well as your fish.