I have a one male and one female Cockatoo Dwarf Cichlids. Also in my 180 l tank, I have 7 cardinals, 4 corys, 3 gouramis, 2 other cichlids (Latecara dorsiger), 1 acanthius adonis and two botias. The male of dwarf cichlid started to be agressive towards other fish (especially corys, cichlid and...