They've hatched! Maybe last night aka 24hrs after soaking. But I was too new to this live food to know that they've hatched. This morning I put the whole bottle against the sun and realised that there's movement inside. Immediately siphon them out and fed them to my hungry fry. They loved it! Didn't even hesitate to take a bite at the baby brine shrimps (BBS). Got lots of extra, so I fed them to dad and mum, they love it too!
BBS, wonder food! Will do a more in-depth study of them to find out the percentage of spawn rate for OceanFree Brine Shrimp Eggs.