The one piece of kit every reefer tunes daily and never quite understands, drawn like a 1950s patent plate and blown apart part by part: collection cup, body, cone, pump, floating up the axis line in fine linework. FIG. 2. PROTEIN SKIMMER. EXPLODED VIEW. And the footnote every keeper earns the hard way, set smallest at the bottom: tuned daily, understood never. If you've ever re-seated the cup at 11pm just to watch the bubble line settle, you didn't buy this sweatshirt. You qualified for it.
The one you reach for on a water-change morning, or wear to the frag swap when it's finally cold enough. A build-completion marker, or a tank-anniversary gift for the keeper who has opinions about skimmer tuning.
Drafted like a patent. Tuned like the real thing.
