20 Gallon Tank Female black Molly attacking Male and Female orange Molly

Hello everyone!
I have a 20 gallons tank with 4 mollies (I checked I have 2 black female mollies, 1 Mickey Mouse female orange molly and 1 Mickey Mouse male molly), 4 albino corys and 1 betta fish. The black female is chasing so bad to the orange mollies, and one of them got the tale eaten (the orange male). I had to trap the black molly in the net in order to stop this. This happened after I fed them, and just to make sure, I gave more food to the trapped molly inside the net in case she didn’t eat enough or something. From the beginning this molly has been more aggressive than the others, but now it went too far. The water parameters are Ammonia 0.25, Nitrite 0, Nitrate 5.0, 80 degrees F. I don’t have another tank to separate it. My tank is 11 days old and it’s cycling. Everybody is doing great, only this fish is aggressive just to the orange mollies. Does anybody know what I can do?

 

I would rehome it our put in another tank if that is an option. Doubtful its going to stop. Mollies tend to be jerky jerkfaces.

 

Hello everyone!
I have a 20 gallons tank with 4 mollies (I checked I have 2 black female mollies, 1 Mickey Mouse female orange molly and 1 Mickey Mouse male molly), 4 albino corys and 1 betta fish. The black female is chasing so bad to the orange mollies, and one of them got the tale eaten (the orange male). I had to trap the black molly in the net in order to stop this. This happened after I fed them, and just to make sure, I gave more food to the trapped molly inside the net in case she didn’t eat enough or something. From the beginning this molly has been more aggressive than the others, but now it went too far. The water parameters are Ammonia 0.25, Nitrite 0, Nitrate 5.0, 80 degrees F. I don’t have another tank to separate it. My tank is 11 days old and it’s cycling. Everybody is doing great, only this fish is aggressive just to the orange mollies. Does anybody know what I can do?

Some mollies are just that way. I had one aggressive female molly that attacked every other molly i kept her with. Out of stress, 3 mollies already died.
Finally,i had to remove the aggressive one. Now i've kept her and an adult male which is larger than her in a separate plastic tub. Will try to breed them outside in a tub as taught by this guy: Can you Keep Mollies Fish in a Plastic Tub - Mollies Fish Care

 

Picture 1 is a platy closely related to swordtails.
Not a molly .
Mollies get larger then platies so may dominate them .

 

Picture 1 is a platy closely related to swordtails.
Not a molly .

Got to agree with this...