The window allowing Football League clubs to make loan signings opened again on Tuesday and will continue until November 4, but Grew believes Vale already have enough options.
"At this minute, I don't think we need anything," Grew told the club's official website.
"Popey (Tom Pope) is scoring goals and you can see from our bench that anyone who came on in Saturday's game wouldn't weaken our side.
"What's the point of bringing bodies in unless it's really going to improve you?"
- Sports & Recreation