7 total. they will be fine for quite a while. id suggest bigger in the long run. i got 6 in my 150 and i plan on getting something 200+ probably 5 years or so from now. if all you have is the 7 fronts. you might be able to keep them in there forever. your not going to be overstocked but just crowded. remember fronts like lots of swimming room in the wild. your filtration and cleaning habits are also in question. if you are good on your cleaning and filtration, you're ok, but if you are slacking in those departments, they wont do well.