10(regular) plant-solo cup grow for seed

Week Two. Not a happy camper as only five of the kids made it to the seedling stage :( Two of the others came up but they just withered and died straight away without doing anything much. It seems when they popped out of the plug they were very pale and white unlike normal seeds that pop with the green leaves or at least a greenish tinge to them. I was expecting 1 seed not to come up as it never popped in the water or in the humidor but the others ... Ah well all is not lost from the five as long as I get a male and female Ill get the seeds I'm after and all shall be merry and gay with the world again. Ive been pondering if my routine has changed causing the issues but I followed my steps to the letter (its written down) and have germed hundreds(literally) of seeds this way so averaging around 92% so I'm pretty sure its not my method. Possibly the seeds but Daaamn--Sensi is a premium seed co and Ive had their stuff before and its generally pretty amazing. Short answer is I don't know - maybe the premix seedling starter was a bad batch and too strong as a possibility .. with the loss of 50% of the seedlings I'm afraid that the solo cup grow is out of the question. I'm thinking some air-pots and let them have a great nookie time in a tent as there's no way this crowd is getting near my RDWC tent.😲