Replace sand

[Shu]

Kyle, doing this method how would I replace it with new sand. Should I get out the all the old sand first?

[barderer]

its easier to let it cycle in a 10 gal with change water like I said, then just temp drain all the water and change it all at once, of course I would still leave about 25% of your old sand. Just put it on the back and the bottom so you don't have to see it.