Float test is notoriously unreliable. It's better to use the one where you slide your fingers from end to roots. If it goes right up (and possible squeaks), it's low porosity. If it has a lot of bumps, it's porous. In between is medium.
3a (Corkicelli), highlighted, fine, low porosity

HGs: Anything Sevi; Curly Kinks Satin Roots, Curlycue ReNew and Coil Jam; homemade FSG and okra gel; soap bars; UFD Curly Magic; Botanical Spirits Jellies, CJ Repair Me, Aloe Fix