sand is a cool idea! in my opinion i think the best white sand is pool filter sand. it stays on the bottom and is easy to clean. in one of my tanks i did 75% white sand and 25% back sand and it looks awesome
here is a pic of my little endli chilling on the black/white sand
View attachment 827375
now to clean your sand before you put it into your tank you should dump some sand in a 5 gallon bucket and run a hose till the water runs clear out of the bucket (do outside)
after that then dump it into your tank
when you do water changes just skim over the sand with your gravel vac
you will find that water changes are much easier with sand
post pics!