aro diseaes

I recently bought an aro that had a light ripped tail, the shop keeper told it'll recover by 2-3 days it's been a week and still haven't recovered I used stress heal and Ocean free O Arowana disease away but no effect, I'll show the image below please tell me if it's white spot ich or fin Rot...

I am having a 16 inch silver aro, which shows two different characters either it keeps begging for food and if not fed becomes ferocious by biting the canister filter pipes , songe filters etc in the tank.. And once in 20 days it goes into a fasting mode when it literally appears to be facing...

I have a 7-8 inch baby silver aro which was doing great from the time I got it. Was eating aggressively. From past couple of days it's spitting out the food after chewing it. I was feeding it twice daily. The food I give is dried shrimps and other dried food for aris. I suspect some water...

My 26" silver aro has stopped eating since last Friday, and has been taking gulps of air from the surface way more than normal. Noticed bubbles being expelled from the vent. Any ideas? It's in a 8 × 4 × 2 with rays, and a dat. K1 filtration, drip system, temp 82, amm. 0, nitrite 0, nitrate...