For the last 4 nights, A guppy, in my community tank, has fallen victom to some unknown cause. The water parameters are great and they live with tetras, a clown pleco, some danios... and 3 yoyo loaches. Every morning I wake up, there is another guppy carcass being munched by the loaches. Today, I move the remaining guppys into thier own 10g tank. Does anyone know if yoyos are that agressive?