The fact that the store got them from what sounds like a local breeder is a good sign. Imported blue rams tend to fair poorly. When they d die, (as mine did) it seems to happen suddenly. Fish hangs in corner and dosn't move around much for about half a day. It usually happens in the first few days, but I have heard of rams dieing after a week in good water conditions.
If you want to get any fry from future spawns, then I suggest leaving out the corys, as rams spawn in the open on flat rocks, and are known to be lacluster parents. If I had a to play another tank with rams as the focus, then I would go with pencil fish (more entertaining and less likely to snack on fry than tetras), and hatchet fish (will school and stay very close to the surface.). A trio of otos for agea control and scavaging and you're good.
Female rams will have bright pink bellies when they aproach spawning time. Males will not.
Good luck
If you want to get any fry from future spawns, then I suggest leaving out the corys, as rams spawn in the open on flat rocks, and are known to be lacluster parents. If I had a to play another tank with rams as the focus, then I would go with pencil fish (more entertaining and less likely to snack on fry than tetras), and hatchet fish (will school and stay very close to the surface.). A trio of otos for agea control and scavaging and you're good.
Female rams will have bright pink bellies when they aproach spawning time. Males will not.
Good luck