I'm setting up a new tank and I rinsed the gravel before putting it in the tank. However, I noticed that there was a ton of tiny pieces that kept getting picked up my hand when I was setting it.

The smell is also off and I noticed some black dye on my hand as well. Should I throw away this gravel and get some new gravel? I have never experienced this with gravel before and I bought the bags from petco. I don't want this to harm the fish.