Welcome to the forum.
It looks fine to me, however, I am not familiar with that biofilter and have not seen one in SA.
The manufacturer says it is good for 80 000 liters, so give it a go and give us an update.
Your turnover could be a bit higher. With a 10 000 liter pump, you will end up with about 7 000 after all the restrictions, and ideally you should turn your pond around every hour.
E Mail: [You must be registered and logged in to see this link.]
; [You must be registered and logged in to see this link.]Koi are not my whole life but make my life whole