Abstract: A testing apparatus in the form of a dip card 10 for testing a fluid medium includes a housing incorporating a grid member 16 provided with openings or tracks 20 for receiving test strips 18. At least one capillary tube 28 communicates between the exterior of the housing and an opening or track 20 in the grid member. The capillary tube 28 enables fluid to pass to a test strip 18 located in the opening 20 in the grid member 16.