You guys know that he's lived peacefully with his corys for a year and half now. Lately he's been chasing them A LOT. I'm wondering if switching his diet to frozen bloodworms has made him more aggressive. He built this sad, sad little bubblenest (it's like an inch long Lol!) and he's been guarding it and flaring all day. If he sees a cory he goes after it. He doesn't bite them, their fins are perfect and they don't have a mark on them. They don't seem upset either, they go right back to what they were doing. If I switch him back to Atison's do you think he'll calm down a bit? He always chased them, just not this often. I don't really want to pull him or them out of their home.