I have bad news to report, I did my 1st water change and had a huge ammonia spike, I lost 2new fish and my little puffer is so stressed he has lost much of his color and is struggling to breathe, if anyone knows what I can do please help!!!! He was a little stressed for some reason before so the lfs told us to do a water change, I must have done something wrong, all my readings came out good but then a huge spike in ammonia! I hate to see him struggle but I don't know what to do all the fish stores are closed this time of night.