A protein skimmer for filtering and cleaning water in an aquarium having a foam generating assembly having an air chamber (73) and a nozzle (74) in the air chamber, the nozzle being provided with a plurality of air holes (741) and being connected to an inlet tube (71), the inlet tube communicating with a foam cavity within a vertical guide tube (20) for foam, the guide tube (20) generally being tapered as a whole and including an open upper end (202), a bottom end (203) and a hollow cone-shaped circumferential wall being formed between the upper end and the bottom end and encircling the foam cavity (21) thereby tapering toward and communicating with the upper end (202).

 
Web www.patentalert.com

< Animal sorting and grading system using an internal evaluation to predict maximum value

> Method for the production of porcine nuclear transfer embryos

~ 00475