pappas, I know your nervous and upset, but you need to try and pay attention to what I am tell you, or this is hopeless. I didn't say remove the dead rock. LEAVE it in. That dead rock, is not dead, it is alive with bacteria, which is exactly what you need....especially when you removed the substrate after I said not to. The reason the live rock is a problem is because of potential die-off of organics on live rock that will occur as you drop salinity. This is not an issue for the dead coral head. I said leave it in there because it is porous and can harbor a good deal of bacterial colonies.
Yes, use the airstone to mix the water. Yes, use water from your tank [that has the ich] and mix it with fresh water [declorinated or RO/DI water] until you can get it to the salinity that you need. Then change out a few gals. Yes, use the crushed coral from your other tank [2 cups].
Your fish doesn't have ich at the moment. My hope is to deal with the immediate crisis of ammonia and nitrites, stablize the fish, and then begin hypo again. Hoping, all along, that we can beat the clock on the ich problem before it hits the clown. The clown has already been exposed to ich anyway.
