Are there any really good combos with these two in a 300 gallon like silver dollars or Oscars or both. Maybe bicher, teacup stingray, or peacock bass.
Arowana is silver not filter
It’s a good size for the gourami but not for the arowana.
If you take care of a silver arowana very well, it will reach close to 29" by the 3rd year of owning a juvenile.