ammonia was at 0, ph was 7.2, nitrites and nitrates were both very close to the 0 ppm according to the color strips, and unfortunately I don't have a hardness test. the worst of the fish ended up passing away last night but all the others are making huge strides in recovering compared to where they were last night. I would have to say in a weeks time they should all be healed up. I am still not completely convinced that it was only the freddy, but I have no idea what else it could be. The symptoms really do resemble ammonia burn but that doesn't account for the readings I got when I tested. I guess I'm lucky if I only lost one fish compared to what all could have happened.