I'm notice small marks around my oscar head...I don't want him to get the hole in head disease. What can I do to stop this I do water changes every week..which is like 15 to 10%. Also, my he has been sleeping alot more during the day, I guess the house is more quite when the kids are at school. He sleep at the right side of the tank on his side is this normal?
Any suggestions?
Any suggestions?