Attached is a picture of my green terror. I've had her for 4 years, she lives in a divided 55g tank now and lost her tail fin to my red devil in a fight 3.5 years ago. She used to lay eggs routinely until about a year ago when she stopped attempting to spawn for some reason (maybe she realized she had no potential mate?). On the other half of the 55 are 2 pairs of convicts.
Questions:
1. Is there any hope of my GT growing back her fin even though it's been gone for over 3 years?
2. Since she is close to 5 years old (i would assume) does that mean her breeding days are over?
3. If no for #2, is it possible to get a mate for her and will she accept him?
4. If yes for #3, how? Can you differentiate at a young age?
5. If she were to get a mate would they need more space than half of a 55?
6. Why did the tail not grow back in the first place?
thanks for answering
seemingly pointless questions 

Questions:
1. Is there any hope of my GT growing back her fin even though it's been gone for over 3 years?
2. Since she is close to 5 years old (i would assume) does that mean her breeding days are over?
3. If no for #2, is it possible to get a mate for her and will she accept him?
4. If yes for #3, how? Can you differentiate at a young age?
5. If she were to get a mate would they need more space than half of a 55?
6. Why did the tail not grow back in the first place?
thanks for answering
seemingly pointless questions 