Its the Tropic Eden Reefflakes - supposed to be 3mm. I thought I had grand select also to but didn't. I may end up pulling it out and trying the grand select which is supposed be 4.5mm.
Tropic Eden Reefflakes Aragonite Sand - 30lb | Premium Aquatics
Tropic Eden Reefflakes Aragonite Sand - 30lb | Premium Aquatics