Abstract: A brushless motor pump includes a case; a motor disposed in the case, and including a rotor and a stator; a rotary blade assembly connected to one end of the rotor; a blade housing mounted to the case and encompassing the rotary blade assembly; an excitation unit for energizing the stator; and a control unit for generating an operating frequency which increases gradually from an initial low value to a constant high value so that the rotor starts to operate at a low speed and continues its operation to a high constant speed.

Abstract: A modular fastener assembly includes a container having a front wall, a rear wall, two opposite walls, and a bottom wall interconnecting bottom ends of the front, rear and side walls. The front, rear, side and bottom walls together define an accommodation chamber thereamong. The front wall has a hole unit formed therethrough. Each of the side walls of the container has a notch formed in the upper end thereof. A holding member is secured to the rear wall of the container and holds an aquatic appliance thereon. A fastening device is fastened to an aquatic tank. A flexible connector includes a body placed within the accommodation chamber, and two push arms secured to the body in such a manner that the push arms extend from the body in opposite horizontal directions and through the notches respectively. Each of the push arms has an outer end portion extending from the corresponding side wall of the container so as to permit pushing of the push arms toward each other.