Hi,for almost 2 month,my tank just have four fish,they are fire eel,pink tail chalceus,frontosa,and senegal bichir.they are still 14-16 cm,except the fire eel,he is 28 cm long.still tiny though.i want to add some fish,but maybe not too much,since my tank is quite small : 1,6 m x 70 cm x 60 cm and the filtration system aren't too strong.can you guys give me suggestion for tankmates that suitable for my tank size when the fish got big and can workout with my fish?oh yeah,if you guys don't mind,please suggest from one or two from these list.these are the selection that available in my local pet store 
scar , knifefish , red snakehead , compressiceps , bala shark , banded leporinus , distichodus , arowana , indonesian tigerfish , banjo catfish , pictus catfish , clown loach , red tail black shark , chinese hi fin banded shark , motoro stingray , platydoras catfish , cichla ocellaris. any suggestion will be appreciated.thanks and sorry if my english is bad
scar , knifefish , red snakehead , compressiceps , bala shark , banded leporinus , distichodus , arowana , indonesian tigerfish , banjo catfish , pictus catfish , clown loach , red tail black shark , chinese hi fin banded shark , motoro stingray , platydoras catfish , cichla ocellaris. any suggestion will be appreciated.thanks and sorry if my english is bad