Skittish baby silver?

Hi, not posted in about 4years, but I'm back lol

I have a 6" baby silver arow in a 30gal (36x12x15) grow out, it's planted with plenty of swimming space, only tank mates a 4 columbium tetras about 2.5", 2 adult kribs and 4 juvi kribs. Nothing bothers any thing.

He swims around fine, feeding on shrimp and bloodworm...BUT every time I go any where near the tank, or enter my room he'll either go and hide behind the filter...

Even stranger tho, he gets that spooked, simply from sitting up across the room, he hides UNDER the plants on the tank floor, to me this isn't normal arowana behaviour?

He's getting worse not better, despite me trying to less 'In his face'

Checked my prams and all are good...

Can't work this guy out, non of my past arowanas have done this, I've had him about 3 weeks, but like I said, non of my past arows have.

It's good to be back

Thanks in advance

Like I said 4 tetras and kribs, it's only lightly planted, 3 small amazon swords in the middle around some rocks, and a java fern either side of that, it's very empty in a lot of ways, he has good swimming space along the front and side of the tank.

He's always swimming about, until I move (7 times out of 10)

I tend to not buy any less than 5" as then I know they are clear from the yolk sack, but yes all my others have been fine and ive never had an issue hence why I'm confused /:

Tbh I found a solution that has seemed to work, I put 4 large yellow gourami with him and now he's more confident and doesn't seem phased by me any more, it must be because there are some top dwellers that aren't shy, seems to have done the trick try it, not like they break the bank or are hard to Rehome if it doesn't work....I know they aren't beautiful but what ever work eh dither fish for shy fish lol

Didn't need a few days, 2 days after this post and he's demanding food lol, thanks guys