Abstract: An improved aquarium filtration system is provided which includes a bio-reactor chamber. The bio-reactor chamber includes a plurality of bio-balls which have a high surface area for collecting bacteria for biological filtration. The bio-reactor includes one or more pumps for pumping both water and air into the bio-reactor chamber. Preferably, the oxygenated water creates protein laden foam and the bio-reactor chamber includes a removable protein collector. To this end, the bio-reactor chamber includes a vertical column for carrying the protein laden foam into the removable collector.

Abstract: An improved fixture is provided for securely mounting attachments to an underlying substrate. The fixture includes an outer support member, an inner retainer, a biasing means for biasing the inner retainer relative to the outer support member, and stops for controlling movement between the retainer and support member. The outer support member includes a central bore for receiving the inner retainer which holds an attachment, such as a threaded fastener. In use, the fixture is temporarily secured to a substrate with the inner retainer positioned so that the attachment does not engage the underlying substrate. Thereafter, the inner retainer is forced towards the substrate to a second position wherein the attachment engages the substrate. The fixture's stops project radially outward from the inner retainer and are sized and configured so as to engage the outer support member in the second position so as to prevent inadvertent excessive movement of the inner retainer towards the substrate.

Abstract: A keyboard is provided having illuminating keys. The keyboard includes a light channeling upper clamshell and preferably key members constructed at least partially of translucent material so that light produced from a light source is channeled upwardly to the upper surfaces of the key members. The light source may include LED or LEC systems in adjoining relationship to the light channeling membrane or light pipe. In a preferred embodiment, the light source is constructed of a substantially planar illuminescent sheet which underlies the light channeling membrane. In an alternative preferred embodiment, a light pipe is constructed to illuminate light laterally along a portion of its length to illuminate a plurality of key members. In still additional preferred embodiments, the keyboard space bar includes a luminescent line or decorative design for indicating the space bar's function and position.