The floor had to be hard enough to withstand the pressure of over one hundred one-ton pieces, but not too deep, either. Otherwise, the reef would catch no sunlight, meaning algae would not grow well and fish would not come to visit. The final spot was located about 20 meters below the surface.
「投放地點的底質要硬，才能承受一百多塊、每塊一公噸的人工魚礁長時間重壓；又不能太深，以免曬不到陽光，礁上的水藻不能行光合作用，長不好、魅力不夠，就吸引不了魚，所以最好在海面下廿公尺左右」，張昆雄解釋。