Abstract: An apparatus is disclosed that separates and removes to an external source, spent cell culture media from a cell culture media and cell culture mixture. The apparatus generally comprises a culture vessel, a filter member, wherein the filter member is positioned in the culture vessel to form an outside region and an inside region. Further provided is a tube member. The tube member being positioned in the inside region and having an opening therein to thereby remove the spent cell culture media brought into the inside region. Further disclosed is a structure for rotating the filter member around the tube member and a structure for sealing the outside region from the inside region when the filter member is rotating around the tube member.