Help Me

[GSD]

As you know i bought a beta yesterday during the night he got a nipped in his fins but i dont know what takmates did it
When i bought him i was assured by 3 people and my friend who has a betta in a communtiy that hed e fine,im worried he could get worse and die.
I have another 5galon which is empty
IT HAD NO HEATER FILTER OR ANYHTING and was once used to hold an illl coldwater goldfish!
Shall i put him in there or lleave him and if i do put him in the 5gal how do i keep it warm???
Please Reply ASAP

 

[asumel]

what other fish are in there
you could move him or the culprit

 

[GSD]

wats in my sig
I cant move him exept to the 5gal

 

[asumel]

buy another filter? cant think of the culprit you might want the help of the expert fish00 hes good on bettas