i got 2 FH from nearest LFS ,one of them had a tail fin damage (nearly half fin is gone from back portion which i know can fully regenerate) and itch both at same time.So,i gave it salt bath treatment for nearly 2 days and itch healed up but now i think that the tail fin regeneration has stopped because of energy diversion in itch recovery.so,is there any way to speed it up.I do water change every 2 days and nearly 25% water is changed once but temp. is a bit on cooler side due to india's weather being cold at this time so how do i know if it is healing or not.will tetracyline work for it.