Here is my pond, i add and change it as i get a bit of money so it is taking some time to get finished but here you go.
Initial sketch of my pond: 
My specs for this pond at the momment is as follows:
Pond Literage : 30 000L +-
Filtration Literage : 2175L +-
Depth:
1.2m to 3m
Suction Lines:
Bottom drains : 1
Leave Skimmers : 1
Returns:
1 x Water fall
1 x Venturi
1 X underwater return
1 x semi submerged return from protein skimmer
Pumps:
2 x 0.45kw speck pumps (15000L / hour each)
1 x 0.25kw pump for protein skimmer
Air pumps:
2 x Boyu ACQ-005 85L / minute (1 x Backup, 1 for Eazy filter)
2 X Boyu ACQ-008 110L air / minute (Bio Converters & Bottom drain diffuser)
1 X Boyu ACQ-009A 200L air / minute (Backup)
Mechanical Filtration:
1 x Settlement vortex (400L)
1 x Infilter chamber - simular to Eazy in a Nexus with 75L of static Kaldness
1 x 3Bag Sand filter
Bio Converters:
3 X 25L Ultra Zap filters with Bio Balls and Oyster shells
2 x 400L Vortexes with 425L of Kaldness in total
Water Cleaning units:
1 x Ultra Zap Protein Skimmer
2 x Ultra Zap UV Lights 30 watt
The pond 
Pump setup 
Mechanical Filtration 
Bio Converters / Bio Filters 
The follow is stil things that need to be done, not neccesarily in the order:
1. Finish the cladding
2. Add a pergola
3 Add a net to protect the koi.
4. Build a wall and roof over my pump setup.
5. Add a bakki shower
6. Add a step infront of the bridge