So, a bunch of seeds that I have floating in their little boats have started sprouting roots. When do I move them from the styrofoam to a soil-mix? Can I do it at this point, or should I wait longer? I read in someone's post that they leave them in the "boats" until the cotyledon leaves appear - but how does that happen if the styrofoam is essentially cinching the seed in the middle?

Also, do y'all change out the water at any point? I'm using a mix of H2O2 and water with a drop of ST, but I don't want these guys to rot or anything.