I have a question, or more so an observation. I have 3 Marble Hatchets housed with 5 Yasuhikotakia modesta, 5 Ottos and 1 Pleco. I notice that 99.9% of the time the hatchets are at the top of the tank but for some reason I have noticed that one of the hatchets seems to be swimming to mid to lower sections of the tank. I'm not sure of the sexing of them, So I guess it could be possible that they are looking for spawning grounds. I am hoping it is not a illness, but they all look good in health. the one that is swimming towards the bottom does seem a bit larger but can't tell if it is bloated or pregnant. Has anyone else keep these guys and have noticed similar behavior?