Ok first I know i'm gonna get a lot of hate for this but I've been having my silver arowana for 6 months and I never bought a filter, i have no idea about ph or ammonia or whatever but how it's still living healthy so now I want to spend more time with my fish by hand feeding it but then I can't because he is always so shy, I feed it with hikari food sticks and sometimes throw in a little piece of hotdog, any tips on hand feeding it?