I don't know what OSH is , but yeah, regular no-fertilizers-added potting soil. I used Fertilome Ultimate Mix, and it grows everything twice as fast as anything I've ever tried
im in michigan for the summer, my 10g and 5g are both with my friend until i get back. he says theyre doing well, but i havent seen them at all. apparently i've been having some CO2 issues with the rex-ish-style diffusor i put in, but things are still growing.