You can’t have 2 females in a tank. Most likely the new additions were immature females who haven’t transitioned to males.
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I put my tank on black out for 2 days. I turned the lights off and covered the outside of the tank with paper bags. My goal was to keep the tank as dark as possible to simulate night mode and decrease aggression. After two days, I turned the lights on and they were getting along. I took a chance...
Age of aquarium has them. I tried black, white, orange, blacke/white in the past. The mollies seemed to be more hardier.
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