LWJ if you go that route then when you add the BG and LMB then add some larger BG. If you use 2in LMB then use your BG $ 65% 2in and 35% 3-5 in. For example at current rates (here) for a 1 acre pond roughly 170 3-5in BG and 600 2in BG. Do however factor in carrying capacity of the pond. If most of the tilapia over winter you may be at capacity next summer.