I started soaking mine it water and a little H202, most of the time you will see the tap root in 24 hours and then you can do whatever you normally do. If they are going to grow in coco or soil I used to put them in coco in rapid rooters and they work great, now I put them in small cups of coco or the final pot. For hydro grows I put them in rockwool cubes.

Some sink, some float, that doesnt seem to have anything to do with if they will grow or not