hi there i also have a 6ft tank with 4x bala shars in there there is blue gouramis black widows angel fish kibenis a parrot fish surevems swords its a real mixture also 4 x plecos ans firemounts but when some of the fish get bigger ill have to rearrange it also please dont add any tiger barbs as my last sharks got harrassed in 24 hours by them and i lost all 3 sharks