With 2 dwarf gouramis you have a good 6 inches left to fill. Maybe some small tetras, cories, platies, or even zebra danios. It doesn't take a genious to do the math here, 2 dwarf gouramis which grow to around 2" each equals 4" minus 10"(10 gal.) = 6" of fish for this general guideline on stocking.*crazysmil