my beta is changing colour, is that normal

dikoda04

Small Fish
Mar 5, 2006
22
0
0
#1
a week ago i bought a beautiful blue betta, about 2 days later i noticed that its fins and tail are changing to red and when i checked again the other day it had gotten more red. i dont know why this is happening. its feeding fine and swimming around normally. i asked the fish store and they said that they dont know, especially since its happening so quickly. can anyone please help me?*thumbsups