Hi, I'm new to this forum so if I miss any info out just ask me what you need to know. Iv recently added 2 dwarf gouramis (both male) to my 90 litre tank, they adapted with no problems so was pleased with my new additions. A few days later one of my male platys which Iv had for 18 month started to pester one of my male gouramis, its doesn't seem to be aggressive but it constantly chases the gourami, to try and solve the problem I put the platy into a breeder box within my tank, I also rearranged my tank around. On reintroducing him back into the tank he went straight back to chasing the gourami, Iv also noticed my other male platy copies him but when he's on his own he is fine. Any help would be greatly appreciated, thanks in advance. Other fish I have in the tank are 3 neon tetras, 2 peppered cory and 1 panda cory. All water parameters are fine