you can do more then 2 fish in the 10g. i have plans to get 1 more in mine. i have 2 clowns, & 1 damsel. i plan on replacing the damsel with a yellow watchman. here is what i have to run my tank:
marineland 100 filter
moded aquaclear 70 (fuge)
2" sand bed
and 18# of LR
i do a 3g water change...