As Andrew stated, if your tank has been fallow for at least 4 weeks, I prefer 6, then you can add fish anytime...
BTW...Your heaters going out did not cause an ich outbreak..Ick is not a cold or a virus, it is a parasite..Stress will not cause ich.. Marine ich does not lay dormant, the higher temps of marine tanks usually causes this parasite to reproduce quicker than freshwater ich....And it IS possible to have an ich free tank. I have two
