Yes it enough to show your 3 members POF as/more 18,260. POF can show more but can't show lower than declared in CIC website.
FSW POF Lists -
Number of Funds Required
Family Members (in Canadian dollars)
------------------- -----------------------
1 $11,824
2 $14,720
3 $18,097
4 $21,971
5 $24,920
6 $28,105
7 or more $31,291
From Express Entry POF list as below -
Number of Funds Required
Family Members (in Canadian dollars)
------------------- -----------------------
1 $11,931
2 $14,853
3 $18,260
4 $22,170
5 $25,145
6 $28,359
7 or more $31,574
So compare from FSW to Express Entry POF, CIC has increased and you are showing based on Express Entry which will more than enough for you.
Hope above will help you...