first problem I have had with my cardinals since I added them a few weeks ago, but now one of them has developed a whitge spot like this one, that is not my pic but it it the exact same as mine an nearly in the same place, I have dosed 2ml of myxazin as it looks bacterial and will do a 20% water change tomorrow, but does anyoe have any advice? water stats are fine and the tank is 60l heavily planted with the stocking, 7 bronze corys, 10 cardinals and 1 apple snail.
