Abstract: An apparatus for aquarium water filtration comprising a macroalgal growth means defining a first macroalgal attachment material and a first bubbling means; and a containment means including a housing defining a first water inlet and a gas outlet; a docking means defining a first docking surface configured to complement a shape of an aquarium wall; the first docking surface defining a first illumination port to enable illumination to pass through the illumination port to illuminate the macroalgal attachment material; and a first coupling means to secure the macroalgal growth means to the containment means such that a first portion of gas bubbles emitted by the macroalgal growth means is confined to the housing.

Abstract: An apparatus for water filtration, that includes a macroalgal attachment means defining a first macroalgal attachment surface and a bubbling means including, a housing defining a gas inlet and a set of gas bubble ports, and a coupling means. The coupling means secures the macroalgal attachment means to the bubbling means and aligns the first macroalgal attachment surface with the set of gas bubble ports such that a first portion of the gas bubbles to be produced by the gas bubble ports are directed to travel along the first macroalgal attachment surface in contact with the first macroalgal attachment surface.

Abstract: An apparatus for macroalgal attachment in an algae scrubber or seaweed cultivator comprising a set of discrete non-connected appendages extending from a support member such that the appendages receive water flow and illumination so as to cause macroalgae to attach to and grow on said appendages, whereby said macroalgal growth can be comb harvested to provide useful biomass or to remove nutrients from the water. Attachment textures and growth compartments are also claimed.

Abstract: An apparatus for water filtration, that includes a macroalgal attachment means defining a first macroalgal attachment surface and a bubbling means including, a housing defining a gas inlet and a set of gas bubble ports, and a coupling means. The coupling means secures the macroalgal attachment means to the bubbling means and aligns the first macroalgal attachment surface with the set of gas bubble ports such that a first portion of the gas bubbles to be produced by the gas bubble ports are directed to travel along the first macroalgal attachment surface in contact with the first macroalgal attachment surface.