Just got a Fiji Puffer today and put him in to my tank while I went to work. He sat in a breeding box with a net that I use to reduce aggression and let the fish check out the new fish before adding (all day). I came home, let him out and he swam into a cave but I noticed some sort of sore with discoloration on his side. He’s acting fine other than trying to get comfortable in his new tank what could it be?
Water Parameters
Ammonia: 0
Nitrite: 0
Nitrate: 40
Water Parameters
Ammonia: 0
Nitrite: 0
Nitrate: 40