skimmer help

I want to buy a surface skimmer for my 5 gallon. It's not a fancy tank, but the duckweed is everywere and want to get rid of it. I am afraid my fish might get dragged into the machine, since they spend most of their time at the surface. Does anyone know if it is a good idea to buy the skimmer...

Hello, I am new to the saltwater setup and my skimmer is filling the bowl with water even turning the valves down or up doesn't prevent it from doing it. when I put the airline in the water it stops bubbling up and filling. I tested the skimmer just yesterday and it worked fine. All I did was...

Hi all I have just set up my protein skimmer with a 900lph pump fitted and I cant seem to get more than a few bubbles forming ( definatly not the sort of amount I would expect ) has anyone got any ideas?