I got two, two spotted gobies from a local store and got ich in my 24Gallon Nano. Unfortunatley, my two clown fish died along with the gobies. Lesson Learned about QT tanks. After 8 years this is the first time i've had this problem. I got a RedSea max 130D 34 Gallon (it was used and already cycled so i could get things going quickly) I moved the live rock and corals as well as the sand from my old tank that had ich and put new water in the new tank. I discarded the water from the old tank. It has been 4 weeks since all of this. Would it be safe at this point to consider putting new fish in (since i moved the rock, coral, sand, etc. and got rid of old water) or should i wait another 2 or three weeks?