Join Date: Oct 2011
Location: Saskatoon, SK, Canada
A great way to rinse sand is to use a 5/10 gal pail, put the sand in, and then turn on the water and just let the rising water push the dust out. Agitate the sand with a stir stick or some such. Get it in the tank, scape and then start filling. If you put a big tupperware container in there, so you can pour water into that instead of directly onto the substrate, you'll get far less agitation and movement. Then wait a couple of days, run filters and wait for it to settle!
I would recommend being careful, as blasting media is usually sharp. Perhaps some sandblaster out there can chime in and let you know more. ESPECIALLY when using it near glass. Be careful putting it in, even during scaping. If you start applying pressure with it against the sides, it's gonna chew up your glass like there is no tomorrow.
As for how much? No idea. How big of bags are they? What are the dimensions of your tank?