Hey Matt,I would think if you ended up with two or at most three in that space with a 250 you would be fine.Its pretty difficult to tell strains this early (almost impossible I would say).I have started 20 seeds and they got mixed up so I at least know they are one of four strains and Ill sort em out when they flower and I can identify em' by their phenotypes.I can sort of pick em' in the veg but I can really pick em in flowering because the pheno's are so distinctive.Not sure if this helps,by the way your little ones look really good and healthy.Good luck and keep us posted.