A protein skimmer apparatus comprises a float (18) controlled suction inlet valve (16), comprised of tubing, such as clear vinyl tubing, preferably horizontally mounted, centrally and predominantly severed or "cut" laterally in an upwardly direction, maintaining an elastically deformable segment acting as a pivoting axis, pivoting upwardly, on one end in communication with first tubing connector (30), in communication with first tubing (19), in communication with second tubing connector (31), in communication with a second tubing (20), in communication with third tubing connector (32), in communication with suction inlet opening of water pump elbow (17). On a second end slip fittedly connected, thereto one end of valve actuator (15). Float (18) has vertical holes therein and receives valve actuator (15) slip fittedly projected through float (18). Suction inlet valve (16) is responsive to movement by float (18). Water pump (26) directs water into lower end of air/water chamber (13), such that water rises within air/water chamber (13), as to raise float (18) buoyantly pivoting upwardly, therefore opening suction inlet valve (16), therefore enabling airflow into water pump (26), therefore reducing water pressure governed by airflow volume, therefore establishing water level (B) in response to vertical position of float (18).Linvention concerne un appareil décumeur de protéine qui comprend une soupape dentrée daspiration commandée (16) dun flotteur (18), constituée de tubage, tel quun tubage de vinyle transparent, de préférence monté horizontalement, rompu au centre et de manière prédominante ou "coupé" latéralement dans une direction ascendante, maintenant un segment élastiquement déformable agissant comme axe de pivotement, pivotant vers le haut, sur une extrémité en communication avec un premier raccord de tubage (30), en communication avec le premier tubage (19), en communication avec un deuxième raccord de tubage (31), en communication avec un second tubage (20), e
