It will settle. Wait a bit and then put him in.
Since you have a sand substrate (which means you can't do complete water changes), I am assuming you are doing a fish-in cycle. Having a filter will make that easier and faster. The surface area in the filter provides lots of real estate for beneficial bacteria.
I am also not crazy about putting anything in a when I don't knowexactky what it is, what it does, how it does it, and what it may effect. That is just me, but it is something to think about. "Aquarium safe" frequently isn't.