There was a before and after post up the other day but i can't find it now- bah- anyhow's here is one of my oldest pics of Lulu right after I moved her to the big tank- and another of her today- you can see the looong tail spikes which only appeared after she started eating the tropical community flakes my friend left for his mollie that lived with her for a while- so i don't know if it was the food or the sudden tank mate that caused this- maybe both?
Before- with a regular round tail
Lulu now with super spiky tail