A buffer is established in a video encoder andor a video decoder. In certain aspects the filter media comprises one or more halogenated resins and one or more contaminant sorbent media. The biological fertilizer composition of the invention can replace mineral fertilizers in supplying nitrogen, phosphorus, and potassium to crop plants. The actuator assembly includes a pair of sliders that move from a retracted position to an extended position when pressurized fluid enters an actuator assembly housing.