elgeebeekei10;3607636; said:only have one 4 incher in the 40 gallon tank , will add on a larger one when I get the bigger tank when the 4 incher gets to 12. so just leave the 240 gallon with one Aro then?
What they are referring to is the maximum length of an Aro. They typically get up to 30+ inches. You really want to give them as much width as possible.
It's either they're hypocrite, or they think arowana is as stiff as a boat, that a 30" arowana need 30-in wide to have room for turning around! I have never used Eheim filter, so I can't give you opinion on them, but I would suggest go with two Fluval FX5 instead, or a good size wet/dry filter that is capable of handling a 240-gal tank. Good luck on your quest!
Well said!