Hi everyone. I been keeping 2 male Endler fish for a few weeks now, and one has gotten more aggressive poking/chasing. So today I purchased 3 more now I have 5 in total. However the one bugger keeps chasing and poking. I Have a well planted tank with decor. How do i stop this aggressiveness ? Here is a pic of my tank. Sorry the Endler's don't show LOL!
https://imgur.com/g5vIGYM
https://imgur.com/g5vIGYM