Hey again. So I have a pair of GBRs that previously bred. They were supper nice to each other and followed each other every where around the tank. They have no tank mates, but now the male is being aggressive towards to female. He is chasing her around and her tail is not bitten in some places. This started just the other day and I am confused on why there was a change in behavior. Any idea what is going on? Thank you!