Thread: Koi Pond filter

Ok so I build a new house last year and with it included an ornamental small koi pond

I travel a lot for work and because I am not there most of the time to take care of it I have not done much with it.
I am approaching retirement and if I can sort out some personal issues I should be retiring in less than a year and I have started thinking about a filter for the pond.My plan is to build a waterfall on the side that you see the white electric outlet on the column, and discharge the filter water through the waterfall.
I am located in Khon Kaen.
This is what I am looking for, but I am open and will consider all suggestions.

I don't like purchasing such things from lazada, because when it comes to future maintenance required I am afraid the seller will not be available for help and advice.
I have looked locally but have not found anything like it in Khon Kaen, I remember seeing a large pet section at Chatuchak market and perhaps I will take a drive and look there.
So any advice on the filter and or the waterfall would be appreciated.