Solid carbon dosing biopellets are the sole purpose for which the Reef Octopus Biopellet Reactor was created. The biopellet media are kept in suspension and uniformly distributed by the cone bottom design. Biopellets are contained within a mesh screen that permits flow, and reactor lids are secured with fastening screws. Three sizes are available. Without limiting the flow through the unit, the fluidizing cone bottom design of these revolutionary media reactors helps maintain the bio pellet media in suspension and uniformly distribute the water upward. These cutting-edge reactor units also have a mesh screen to keep the bio pellets inside the reactor without the possibility of clogging or limiting flow, unlike other media reactors on the market, and fastening screws on the lid for a secure tight seal.