I don't know what happened. everything was fine last night then this morning I woke up and one of our cremecicle mollie was lying twisted on the bottom of the tank still alive but breathing hard. I put her in a breeder box to keep the other fish from her. I don't know what happened. the water tested fine last night except for the ammonia which we can't seem to get rid of. its staying at .25 for weeks now despite water changes every other day. she gets this burst of energy every once in a while and flops around in the tank but mostly upside down and sideway then rest again on the bottom in a u shape with her body. I think she going to day today. I took some pictures of her. can anybody tell me what happened? or if there is any hope. the other 9 fish are just fine and acting normal.