Moonbeam, you're going to lose your plants. Never give seedlings anything, and please don't recommend to others to do that. Also this is a threadjack- start your own thread.

To the OP- your plants look like they will make it, and you are correct that poor pH would cause that. The new growth you are seeing looks much better. From here in, adjust your water pH before you give it to the plants, and that should fix you up nice. 6.8 is a very good place to aim for.