OK... Since I am rinsing my gravel in my bathtub... will it be okay to rinse it out and then put it straight to my tank? It's all laying on the floor of my bathtub. I didn't wipe my tub down first before putting it in there... now that I think about it and it makes me a bit concerned. The soap scum or whatever... But it's actually pretty clean looking. No soap smell or bubbles.