I have recently lost a lot of fish includeing my monster blue phantom pleco and all I have left is a hatchetfish and lemon tetra but the lemon tetra doesn't really want to eat and if he does take abite he spits it out the hatchet is fine and actually eats parameters are fine the tetra also paces glass of tank he also was the alpha lemon tetra in tank with other lemon tetra and bleeding heart I don't know if that helps wat should I do