Make sure give the goldfish fresh water once a week

Make sure(to) give the goldfish fresh water once a week

Make sure （that） you give the goldfish fresh water once a week.
一定要一周给金鱼换一次水。
Make sure 后面接宾语从句，要用一般现在时而不是将来时。

Make sure (to) give the golefish fresh water once a week.