So I have a 120 gallon with 1 Oscar 6inch. 1 pink jack 5inch. And 1 Raphael cat 7inch. And everything was great for months and months then the last couple days the jack is trying to kill everything. Oscar is beat up and now my jack is trying to take on the spiked Raphael cat bigger then her. Why the turn of aggression? Spawning time? Idk I've tried everything. Moved stuff took stuff out. Moved fish temporarily then back in. But for the last 3 or 4 days shes been so vicious. Any help? I took every decoration out of the tank and just put 2 clay pots in there so both fish can hide but nothing sharp for her chasing the Oscar.