'Sup MJ . When u soak seeds, the ones that sink are good ones, although u'll need to tap the floating ones to see if they just needed a hand being submerged. I would just do like HeadshopGirl mentioned. If they are going to be soaking for more than 24 hours, id put a lit'l h2o2, 10ml to 8 fl. oz. so they dont get oxygen deprived. good luck. Peace, e