my silver grew to 4 ft by the 4th year. aussie aro grows slower but gets to 3 ft minimum. i say with that filter system, keep 7 silvers and one aussie and add more when you have more room (new tank!). A couple stingrays and or bottom dwellers... enjoy!!!
i switch everything to asian aros now. but yeah, 4 ft long!!! ugly barbels, all it gots was size.
ray and aro size must be accordingly. ray pups are usually 3-4 inches disc. aros is should be 8-12 inches.
got 3 reds. each tank has an aro and three rays. marbles.