Any reasoning as to why you don't want to put soil as your substrate? As you are new to keeping shrimps, I would like to ask if you're also new to aquarium. I ask because i'd like to have a general idea as to your experience and expertise in maintaining certain water parameters. Most of us (99%) use soil because it helps us to maintain the parameters to something that suits our shrimps.
The answer to your question is yes, you can technically use any kind of gravel you want (including your black one) as long as they are inert. For this you need to do your own testing using a bucket filled with your gravel to see if the water parameters remain the same..
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