Got through a whole 500ml of glue today, completing the majority of the technical room work. The system will comprise of three pumps (one for filtration / heating, one for bubblers, and one for water fall). The inflow for each of these are on the lowest level and each have a non-return valve to prevent draw from a pump when it is off.
The right hand side you can see the bypass which will lead to the air source heat pump outside. The T-piece will be connected to the filter.
The heating then moves around, through a non-return value, to the oxidization & chlorine cell (clear vertical tube). This also has a bypass valve setup and along the top there are three unions for sensors (Redox, PH, and flow). All of this then runs into two balanced return valves, going to the beach and shallow end, respectively.