I said yesyerday use Maracy-two it's a broad spectrum antibiotic. The blood streaks in and at the base of the fin is sign of hemorrhagic septicemia a bacterial infection of the blood. Keep the fish in the present tank and start treatment. Dose according to the instructions on the package and keep the water as clean as possibile during treatment.
well the thing is for the tank he is in, is 140g and that is a BIG dose of meds and much more expensive then having him in a smaller tank to med/treat...