UPDATE: the fin is growing back FAST in the hospital tank where he is alone,
no subtrate slightly warmer water and no other fish,
the fin is back to about half the size of the other one and already a nice black,
another 2-3 weeks and he should be fully healed
no subtrate slightly warmer water and no other fish,
the fin is back to about half the size of the other one and already a nice black,
another 2-3 weeks and he should be fully healed