need help with figuring this out please. we posted this problem in the tropical fish thread when the spot was small. only one person responded back that they thought the fish just nicked himself. however this is the next week and the spot is worse so I want to try this thread as its being quite an emergency issue. he has had zero change in behavior or appetite. ive attached pics of week 1 and then week 2 for your reference. can anyone please let me know if they've seen this before? we'd hate to lose him.
thanks
week 1 :
week 2 :
thanks
week 1 :
week 2 :