If kept in good water and fully cycled tank and feed good quality food you won't need to do anything for fin/tail rot. I brought a midnight clown with its tail completely gone and half its fins missing, kept it in the best water possible and feed the best foods. Fish was back to full health within 3 weeks and 6 months later is probably the healthiest its ever beenVetteguy, do you have any suggestions for the fin and tail rot?