My 3 little African Violets

Here is my 3 little African Violet, the 1st one which have lotsa of blooms, its flower died off when I changed it to grow in the BLACK BOX hoping to darken the leaves colour. Ended up it's flower died. :(
Anyway, I proceed with the removal of some leaves from the plant to make it less cluster.


2nd African violet, I am still waiting for it to bloom to know it's flower colour and pattern.
3rd African violet, flower died also when I shifted it to my living area. Guess enclose environment in the room cannot make it, maybe with air-con will help. Now shifted back to balcony, it's flower continue to bloom again.