Hi guys, new to this forum. I purchased a new angelfish last week for my 40 gallon and in the past 24 hours i noticed a yellowish lump appear on the side of his gill. I have never seen this before. I have no quarantine tank so he was placed right in the 40 gallon. The tank has been running for 3 months and ammonia and nitrites are zero, nitrates are 10. How do i post pictures on here so it can be seen what is wrong? any help wuld be appreciated.