I use the TF multi 100 on my 40 breeder. I have had it for years and it is a good skimmer. New it comes wiht the pump, if you need one the replacement is sold at MD and PA. It is a ocean runner needle wheel.
Yes it sucks air through airline tube which is pulled into the pump and through the impeller (needle wheel) and this chops the bubbles into a fine mist. I have used this skimmer on a lot of different tanks and would say it tops out at about 60-75 gal. Bigger then that look for a different skimmer.
The turbo flotor skimmers are a great product and i have used them all! And they work without some of the fancy bells and whistles now found on many skimmers.