mollies chasing each other

Question
i have a 30 gallon tank with a 70 gallon filter.it has been set up for 4 months i don't know all the levels. in it are 3 razboras 3 mickies and 4 mollies. our black mollie relentlessly chases the white one and pecks at her underside. what is going on should i be concerned should i get rid of one of them?

Answer
Hi Scott;

Sounds like you have a very persistent male who really likes that female! You may need more females like her so he doesn't wear her down. She could get sick and die. I would get 2 or 3 more just to keep his "attention" spread out a bit. He's a very frisky little fella!

At Your Service;
Chris Robbins