A toilet vent comprising a first fluid connection and a second fluid connection. The fill tube is configured for the bag to be mounted on the fill tube. Upon retrieval, seismic data recorded by the unit can be extracted and the unit can be charged, tested, re-synchronized, and operation can be re-initiated without the need to open the unit’s case. The pattern of clear fluid is applied to a paper media traveling in a particular direction, wherein the pattern is generally elongated along the direction of travel.