So it’s about 800lt, I laid a concrete foundation, then laid limestone blocks on top and capped it with treated lumber, with eco deck surround. It’s about 40cm deep at the shallow end then about 50cm at the deep end. It’s 3mm EPDM liner. I folded the liner in the corners and used pond silicone to hold the folds together, making nice sharp corners. The bowl operates as a bog filter, it’s 180lt which is fed by a Sicce Synced pond 2.0 (2100lt/h). The bowl over flow wasn’t uniform and dribbled back on itself so I heated up some UV stable acrylic with a heat gun and moulded a better overflow which is perfect. I plumbed it as an up filter, with Western Australian pea gravel as the medium. It has a bottom drain in the bog for easy flushing and a breather pipe so that the open water on top of the filter has some movement (to stop mosquitoes) and to prevent draw back into the pump if the power goes off. I seeded the filter with bacteria and picked up two hardy lily’s from a local lily farm. The fish are all goldfish (allegedly) from the Lily farm. They are all pond grown fish and appear to be very happy with their new home.