Hello I have a 4 inch female Thai silk FH and I recently moved her into a new tank which is a 55 gallon, behaviour and appetite are fine since the move but I’ve noticed she’s getting some marks on her forehead wondering what it could be? I was thinking the start of hole in the head but it doesn’t look like it too much like other cases I’ve seen, I checked the water quality the only thing is the water hardness is abit high but everything else is in normal range







