Pine flooring : is there something I can put other then wood filler?

in a tongue and groove pine wood floor to fill the random spaces that will hold up and not pop out with the movement of walking on it?

Pine flooring : is there something I can put other then wood filler?
Do it properly, get a floor clamp, and start pulling them up tight again. They will be well seasoned by now, so you should not have to worry about it happening again.





Unfortunately this is not an easy fix, and will take some carpentry skills, time and hard work.