I "cycled" my tank for 24 hour period which I was misinformed about. Anyways I've been trying to save the fish by doing a 20% water change and adding aquarium salt. I lost one fish today. My ammonia level is .25 or less then my nitrate is really high as well as my nitrite. Is there anything else I can do to lower these and relieve the stress on my fish? My fantails are staying at the top of the water gasping for oxygen so I think they wont make it tonight. They are my favorites and I'm really trying to save them all. The other fish seem to be doing better as they are trying to swim around and have stopped bottom sitting and clamping their fins.