Hi all, My question is my tank had ich all fish died. It is now empty and being treated with high heat and food. I have heard two different answers on how long to leave the tank 1 or two weeks? I would think if there were fish in the tank I would agree with the two weeks but with no fish to latch onto I would think 1 week is fine. Does anyone know for sure or have actually done this? Thanks I appreciate all the help this forum has given me.