I'm sad to say that the little guy has passed. I just wish he could've gone in a better way, or just prevented it in general. I'm not even sure what the reason behind it was. Everyone else is still fine, water quality is good, little hard, but fine.
All I have to ask now is should I rehome the female? Will she still live a good quality life without another kili in the tank? Any other reason why he could've passed or is it just bad luck?