guppy fish breeding and light colour

Question
Hi Will, first of all thank you for helping me.
I have guppy's and molly's in my tank. i have two questions about my guppy's.
1.> my some female guppy have very light colored tail like the color is almost gone. What can i do to improve or enhance their color and make them dark and beautiful.

2.> my female given birth before 4 month when i buy her.after that she never gave birth or get pregnant. I have only one male guppy i have him for 5 months and he tries to mate with my female but my female don't get pregnant. i tried 3 to 5 different males but they don't try to mate. what to do how can i get a proper male for my guppy so they breed?

Answer
hello,
sorry for the slow response.
1. you can only enhance color if it's there to begin with. unfortunately, if the tail is light, it will always be light.
2. if you have sexually mature male guppies, they will breed. it might not be instantaneous, but i promise if you leave them in together, provide ample food and a low stress environment, they will breed soon. you might consider making sure there are places like plants and large gravel for the fry to hide so they are not eaten if the female unexpectedly gives birth.