A fish net, comprising a frame, and a net, attached to the frame, and including a length measuring scale disposed on the net, configured to allow a user to determine a size of a fish held in the net by visually comparing the fish with the length measuring scale. The pump shaft is connected to an output shaft of a motor arranged outside the pump house through an intermediate shaft piece through a wall of the pump house. Normalization is accomplished using simplex reactions involving these self-normalizing primersoligonucleotides; the normalization parameters are then useable across all control and experimental reactions of the platearray.