Adding sand

[Asbestos]

So i picked up some Quickcrete medium sand for my tank, now i have a question about adding it. How is the best way to clean it. Also this is for my 10g tank and eventual my larger tank, so my main question is, i currently have gravel in my tank and a established filter, but the filter is a crappy one should i wait until i can pick up a liquid test kit and a better filter before changing the substrate.