



New Betta, curious about his age
I got this Betta 2 days ago from my LFS. He was labeled as a Blue Marble Plakat and much larger than the other Bettas around. I've usually had a mix of Bettas throughout the years (mostly rescues) from flowy finned males, to a sorority of shorter finned females, but never a Plakat and it's one fish I've wanted to keep for a few years now.
He's relatively chill aside from constantly trying to find things to hunt and peck at rather than accepting commercial fish food but so far hasn't harassed the m/f pair of RCS I added and the larger snails. He moves around a bit slowly which I find surprising since Plakats are better swimmers and are more closely related genetically to the original Bettas bred for fighting.
My questions are:
Roughly how old would you guess he is? He's pretty big (has a 5G too himself for scale) has a beard, and most of his coloration seems to have come in.
What could I do to keep him stimulated? He seems to be a pretty active hunter searching for micro fauna in the tank, but aside from that I'm not sure how to keep him from getting bored when he seems relatively indifferent to human interaction unlike my previous fish.
Does he seem healthy overall? His fins are a little torn up in some spots but I'm hoping that being in a clean tank will encourage them to regrow rather quickly (assuming he's not just experiencing symptoms of old age.)
And before anyone says anything, I kept a sorority of 3 females in a very heavily planted community 29G and never had issues with fighting. I do not recommend this for beginners or people without experience and multiple tanks. Also I know 5G is the bare minimum size but it's all I have to work with right now as my apartment is small and I'm sure the fish is happier here than in a tiny space.