Betta Mistreated, I've Taken It In. Attempting Rehab. Help?

[solsed]

I did give them a wash, just in case.

These leaves came double washed already, but I'm a little paranoid...

Haha!

 

[HayzH]

congrats on your beautiful boy. He's a cracker....and alot like my Jackson.
 
I know he's a pensioner and all...but just wanted to say, Bettas are notorious for jumping out tanks....try to get hold of a lid or condensation tray to stop him taking a leap of faith xx

 

[solsed]

Oh really? I thought his tail would provide too much drag? I have something I can put over it though. Will do.