This is my completed pond, it holds around 5000 gallons of water including filters, it was fibreglassed by Matt from GRP who made a very good job of joining the original installation which was done by GRP to the new extension. I have a skimmer fed directly to a bakki shower, which also has a bottom drain to a vortex and then to the shower, also main filter is vortex through a 6 chamber system. I also have a mid water outlet to a cetus sieve then pumped to an eazy pod.