Thanks for the warning Doug, but when I set this up a few years back, I cleaned the vane type pump completely with iso-prophyl alcohol before using. I don't have carbon after the pump but I use
filter floss material to trap any airborne solids. These pumps, even used, run 24/7 for years. The next one will be a rebuilt one but I'll have to run it a long time unloaded, to break in the vanes, before I can use it for the skimmers.
The skimmer shown doesn't have a collection container yet as I haven't perfected the design. The foam shown takes only an hour to produce.
This skimmer will even work with fresh water, but not to the same degree as salt.
My next project will be to find a cheap source of air for the skimmers but with a quieter producer than the existing air pump.