[Balancing Act] London -- For several years IoT has been one of those annoying acronyms at conferences. In reality, it already existed in a number of M2M applications like fleet management. But actual innovation and new applications in Africa were thin on the ground, which is worrying as it forms part of the 5G business case. This week Russell Southwood talks to start-up founder Dave Okech, Aquarech about using IoT for fish farming.