Hi! I've been looking on this site a lot and just made an account, hopefully you guys can help me with some questions.
I've had my betta, Marb, for a month now. These past two weeks he's had this grayish blue markings that start at the bottom of his fins and move up towards the tips. When I bought him (from petsmart) he didn't have this at all. I've been searching a lot and can't seem to find if this is a disease or his natural color coming out.
Any help or opinions would be appreciated.
Tank- 2.5 gallons
Whisper in tank filter 3i
Small heater (only gets tank to 74 degrees, want to replace it ASAP, recommendations?)
To condition tap water I use API betta water conditioner
I use aquarium salt according to directions
Marb has plenty of places to hide, tall fake grass, a couple of real ferns, some fake bamboo, fake grass, and a rock with some nylon plants coming out
Smooth gravel bottom
I do a 10-20% water change every two weeks
Change my filter every other cleaning