would some polypterus work as good tankmates for an african arowana and some spotted gar? other tank mates may include the clown knifefish and a tigrinus catfish, but they dont have to. tank will be 360 gallons 8x3x2ft.
i would say that it would work. bichirs and gars are in my opinion the best tankmates for eachother. i have seen all three species housed at once. (gar, bichir, and african aro). the clown knife might be alittle aggressive but it might work. and not sure about the tig. i am quite sure others will have better input but this is my opinion.
They should be fine, i have 1 African Aro with 3 Bichirs right now and haven't had any problems at all.. I don't have any gars right now though, but have in the past and had no probs with them either..