I had 1 blue and green Endler's live bearer in my 29 gallon tank. I saw him last night and he appeared healthy, swimming around with a guppy and he came up to eat some Fluval Bug bites. I was just watching my tank today and I can't find him. I moved around all my decorations and looked between the plants but he's not there. I checked all around the outside of my tank too but there's no sign of him. My water parameters are 0 ammonia, 0 nitrite, 8 nitrate. Could he have died overnight and been eaten that quickly? I can't find bones or any trace of him. 