A DownDraft Skimmer is a skimer of simple construction, which consists under others of a box, a Beckett Injector, a Reaktosrohr and a strong water pump

Note: a Beckett injector is well-known in the German-speaking countries also under the name Schaumsprudler for pond pumps!

The box is from 6 mm thickens plexiglass plate cut. Two openings, one of it are above are intended the Reation pipe and amount to in the diameter 120 mm, into the second opening the Spritzrohr by 50 mm in diameter are used. Laterally the box is a further opening, into which a course slidegate valve or a shut-off valve (1 ") is fastened.

The plexiglass pipe exhibits the following mass: Diameter 120 mm, height of 180cm.