Riddle #20

Question: I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter.

What am I?

Question: What fish only swims at night?

Question: What kind of mouse does not eat, drink or even walk?

Question: What has a bed that you can't sleep in?

Question: What tastes better than it smells?

Question: What goes in the water black and comes out red?