Both will do fine
Sand is usually used.
It doesn't. Topsoil absorbs water better than sand and clay.
plants that like water grow better in clay and plant that don't like water grow better in sand. like cactus
yes
it is DIRT
Simply put, Quartz is harder.
Because water is better to use to put out fires than sand.
Novanet:Gold
you could,but it'd be better to use sand
because sand has small grains and allows water to travel through it. Clay has smaller grains than sand and doesn't allow water to travel through it quickly.
Water does not filter particles: it is the other way around. Pebbles, gravel, and sand are used to filter water, with the smallest particle size (sand) filtering the most particulates from the water, whether it is salt water or fresh water.
Red Eared Sliders are water turtles so they need water but sand can be in their tank with them. Sand tends to clog filters though, so gravel would be a better option.