Cool, that's kind of the less "usual" bolbitus. I have the more usual 1 b. heudelotii. It likes water flow so I put them in the filter return area. I'm guessing yours would like flow too.
Like all ferns, it will want to have its rhizome (the green sideways stem where leaves & roots both grow from) out of the substrate. Your plant look to have roots both above & below the small rhizome, you might want to attach it to wood or a rock. Good luck!