Molly problems?

[despreauxb]

Okay so last month or so I got two dalmatian mollies, a betta and an assassin snail. My betta died and I thought maybe it was because of an infection, I never noticed my mollies bothering him I always saw them minding their own. Then this week I noticed my snail was dead. I did see my one Molly checking him but thought nothing of it. Well today my other Molly was dead, I did notice after my betta died that my one Molly started chasing him and stealing all of food to the point he became like twice the size of the Molly. Now I have a single Molly. I know that they are social fish but I dont really want to purchase more fish for him to just kill. Will he be okay?

 

[UnknownFishies]

What are your water parameters

 

[Sgooosh]

What are your water parameters

and tank size

 

[despreauxb]

and tank size

Ph is about 7.4
Ammomia was .25 but did a good water change and have been doing ammonia treatments
Nitrites were 0
Nitrates were also around .25 I believe
And its a long 10 gallon with heavy live plants

 

[UnknownFishies]

Did you add anything knew to the tank?

 

[despreauxb]

Did you add anything knew to the tank?

No