I agree with them, but i would suggest that you return those fish to the store, do a fishless cycle on your tanks, then get fish that are more suited for those two tanks. the barbs need a bigger tank than 10g and are much more peaceful when in groups of 5 or so. Depending on what kind of gourami you have, it may work in a 10g if its a dwarf, if not, you'll need a 30g tank for it too