I have a heavily planted 20 long, containing a pair of aphyosemion australe, 3 sparkling gouramis, and a group of 6 pygmy corydoras. The female kili has had issues since being introduced to the tank, her stomach seemed larger than usual and she had swimming bladder issues. She has been in there for a few weeks now and is able to move between water coloums and eat fine, but is just slightly tilted. The male kili has recently (within the past hour or two of posting this) started showing issues. He can't seem to flip himself upright and is having issues swimming. He seems to be gasping for air and having a really hard time getting around. Upon seeing this I did tested water, everything was near zero besides ammonia, which was slightly higher than normal - nowhere near fatal. I did a 50% water change and dosed two tablespoons of salt. Is there anything I can do to help with the male kili or did I just end up with bad luck. If the male passes will the female be alright without a mate?