Tap down the seeds that are floating with your fingertips, don't worry if they continue to float.
Usually within 48 hours the seeds swell and split their outer seed casings. DO NOT continue soaking after the white roots are visible at the crack in the seed casings.
Don't bother soaking your seeds at all,i have found that the best way to pop the little ones is to poke them straight into warm jiffy 7's or root riots and place them in a warm propagator...DON'T OVER WATER BUT DON'T ALLOW TO DRY OUT COMPLETELY!