Definitely do a water change. Make a makeshift syphon out of extra airline tubing, or just take little bits out with a small container and check for fry. If you're careful, you'll be fine. It's more important you get the nitrites down for the fry.
And no, do not use normal table salt. That has added in additives that aren't going to be good. You need to use Aquarium salt.
And no, do not use normal table salt. That has added in additives that aren't going to be good. You need to use Aquarium salt.
