Hiya! I currently have a five gallon planted tank in my possession with two male guppies. Water parameters have been good for the past week, except for a higher pH (around 7.6), which I was told was okay for guppies. One of the guppies is bullying the other, constantly chasing it and sort of trying to headbutt him. There's a vallisneria, some bamboo, and a japonica in the tank, but still some empty space. I've read that putting more plants etc. to break up the line of sight of the bully can help; I've tried to isolate the bully and his behavior has not changed. I've also tried to put mirrors up against the aquarium. Would adding one more guppy help with the situation as well? I'm concerned and at a bit of a loss for what to do, especially being rather new to the hobby!