Can watching fish red blood can make aquarists difficult to become like this? Even if you don't read the amount, you have to explain it clearly, it is just a damage to the water quality and body surface, as for how difficult it is? Water quality first, conditioning second, drug third, slightly stop, to avoid more serious stimulation of water change is not good, on the drug, the drug is not successful, and then consider the water change, alternate, point to the end
