I don't like the Petco sand at all.. I have it in one of my tanks and it's not actually sand, but very fine tinted gravel.
It took me hours (all afternoon of rinsing several times, and letting it sit a while, agitating, and repeating) to rinse 5lbs of it and get it clear.. I was using a pitcher to do the rinsing so it was easy to see that it was not "done" plus tons of it floated in the process, it was just a mess.
Personally, if you're not above bagging it up and returning it, I would recommend that. I wish I had returned mine, because I did another tank days later with Caribsea's Tahitian Moon sand and it was MUCH easier to rinse (it was basically clear immediately, all rinsing did was flush out the super fine stuff), and I like the look of it a lot better - it's more sand-like even though it's also not technically sand (all of the other caribsea sands are sand, except the black stuff). It also doesn't hold on to air bubbles or float the way that the petco stuff does.