I've got a 300litre community tank which has 15 tiger barbs in it, they have been there for about 2 months and last week I noticed one had a hole or bite on it's side so I quarantined it for afew days and it was looking better.
Yesterday I noticed atleast 3 now have the same bites and saw some being nipped at, they leave the other fish alone.
Anyone know why this maybe happening I do have the temp higher than normal for tiger barb 30C as it's better for the other tankmates, Discus, blue Ram, fire eel, bristlenose & pearl gouriumi