i decided for that idea cause didnot want UV light electricity nor reverse osmosis
Did a quite a bit of research on ultrofiltration and had no complaint about our waterquality ( tested to EU standards for potable water ) out of a pond
At the time those systems where available in the UK and in USA, for a horrible and irrational price , so ordered from them, think its Malaysia ..... i paid under 1000 Euro delivered to Ireland ( think it was actually only 600) including a spare membrane cartridge
The filter is an inline filter that needs backwashing, once a month , the size , is depending on your wanted flow rate and pressure
https://en.wikipedia.org/wiki/Ultrafiltration cause our spring pond water had some iron and manganese that i wanted to get out , i installed a venturi valve that injects air in the water and then one can filter the stuff out ......