The two Vortex filter that I have installed for my Koi Pond has been working for a few weeks now. I am now testing the Vortex by turning off my existing filter to see if those two Vortex is able to cope with my 10 tons pond. Water has cleared up slightly but remain greenish. I shall allow the vortex to mature over a period of longer time, possible three month before making any conclusion.
Feeding amount is minimal and will slowly increase back to normal level when the bio filter mature. Will post the result soon.