A winder insert for a fish tape reel fits into a center opening of the fish tape reel and engages an inner periphery of the reel. A 180 x pulse is applied in order to excite spins. The small size of the microwells causes the growth of bacteria in the well to quickly show a change in the electrical properties of the well, particularly in the capacitance or resistance between the electrodes at each well, with growth to saturation occurring for common bacteria such as E. Optimization annotations may also be utilized for data value recovery.