How to use aquarium pump/filter?

Question

I just got a used aquarium filter from the pet store but it says aquarium pump on it but i dont know how to use it? do i put the whole thing underwater? or just the bottom part? and it says "hoi yong" on it... theres a tube sticking out the middle of it and inside the bottom part there is this black wirey stuff?? please help...

Answer 1

put the filter cotton$$ in it from down first (there is a small cap in its bottom that u can open to put the cotton from) then put it in the aquarium under the water  and after u r done plug in the electricity