2 glofish (not goldfish) chasing the 3rd?

I have had 3 glofish for a while and they were pretty friendly ntil nowadays when 2 of them seem so have formed a coalition and chasing the 3rd one constantly, who has to salt away under plants and other spots. The way they chase bothers me, they seem to suddenly speedup and upset the 3rd fish and many times actually pounce on him and actually touch him. They might be trying to mate but one of the "predators" is feminine and the "victim" is also female.

I had one male molly chase a feminine molly to death once so I am worried about this poor glofish.

10 gallon tank. 3 glofish.

1. Any suggestions/insights on what spooked them nowadays?

2. Will adding another glofish bring peace to the group?

Thanks
Answers:    Glofish are genetically altered zebra danios, who, in small groups will often bully one beneficiary. I'd get 3 more glofish (females) to dither out the hate :) odd numbered groups of 6 mor more do best beside these guys.
You can find females who are just as aggressive as the males. If this gets any worse, you should remove the male who is chasing, and see how the two females procure along. If you can't do that, because you don't have another tank, then you may know how to add another male glofish. But if you do this, craft sure you have an extra reservoir just in case nought works.
What variety of clear resin can I use to spawn Aquarium decorations?   How lots pounds of fish cistern rocks per gallon of hose?   I necessitate a few estimates...?   Java Fern: Will my Green Spotted Puffer Fish munch through Java Fern?