Im a newb at growing so it could just be me being impatient but i put my seeds in a mug with water around 22 degrees(C) left for a few hours then gently tapped the seeds to make them sink.a day and a half later no reaction from them, they are just sitting at the bottom!! could they just be dud seeds? I did order them from a seedbank so i thought they would be reliable to at least seed. any help would be appreciated.