I have 2 becket injector skimmers for sale. I built these myself, patterned after an Aerofoamer skimmer.
second one sold ages ago. First one still available
The first one:
$50
It is auto waste collector compatible. It requires 1000 gal/hr presssure rated pumps. I would rate it conservatively at about 150 gals.
Here is a pic , 24 hours after it was first installed:
(the collection cup drain was later changed to a larger, barb style fitting. )
Will not ship.