what would the perils of treating the whole tank with rid-ich be?
< Any time you add medication to a tank it will affect the bacteria that are needed to break down the toxic fish waste into less toxic substances. If your medication killed off these bacteria then you could have a deadly ammonia spike. The components of rid-ich are basically a formalin-malachite green combination, so look for these ingredients common found in ich medications.-Chuck> most, if not all, of them have a few dark spots anyway. I have already treated the tank with antibiotics for 7 days and it didn’t get rid of it.