is this a normal thing for a betta fish to do? i have guppies in my tank as well as a black ghost knife fish and they seem to get on fine besides i saw one of the guppies nip a bit of the tail of the betta. he usually hangs out in the plants and comes out a lot more at night but he does occasionally pop out during the day. i got him about a day ago. i also noticed his scales seem to be fading? is this normal or something that i need to be worrying about? thanks