Water changes

  • We are currently upgrading MFK. thanks! -neo
The ammonia has to be converted into something. Unless you have plants it's not going to disappear. Even at that I doubt it it's really prepared for the bio load of an arowana when it was cycled using 3 small guppies. You'll probably have another ammonia spike.
 
A small one will not do very well in that condition. They're pretty delicate when they're small IME.
 
ill put more bacterias in it just to play it safer

Sorry for the bad spelling ,isnot my first language
 
If you add sludge from a cycled filter you'll probably be ok. Good idea.
 
no, i dont have any trusted source of sludge , my other tank is salt water, im doing some testing as we speak
 
MonsterFishKeepers.com