One of my salmontail catfish (arius leptaspis or graeffei I believe) was injured when I got him, one of his pectoral fins was broken because the guy used a net to catch him and it got caught, it's showing signs of healing but also the first ray of the fin has turned a red/orange color, I hope it's not infected or is this just a standard part of the healing process? I've tried taking pics but they're so speedy I can't get a shot that shows it at all. They are about 10cm long and living in a temporary 45g tank, there's 3 of them, tank was seeded with heaps of filter media and plants from other tanks but there's still low readings of ammonia (0.25/0.5) 0nitrite and 0 nitrate, ph is 7.6