from the PR it looks like there is no building with 36 APM that you have counted. Building 1 has 48 standard APMs while Building 2 has only 4 very large "APM" (12x as large as the standard APM):
Currently two buildings are nearly complete. Each is specially configured to use SIAF's proprietary APRAS technology and each covers 8,580 square meters (2.12 acres).
The first building ("Building 1") houses 48 sets of standard APM units, each with two tanks and one filtration system in the middle. These are used for nursery tanks and for stage one and stage two grow out.
The second building ("Building 2") houses the equivalent of 48 standard APM units, configured with four very large tanks and eight large filtration units used for stage three or final grow out. Building 2 facilities are to be shared by the grow-out facilities in a third building ("Building 3") that is identical to Building 1. Building 3 comprises the second stage of Phase one of the MegaFarm. Together, all three building facilities will bring the designed production capacity to 10,000 metric tons per year. Currently most of the infrastructure and foundation work for Building 3 building is underway.