Hi
@fishtales I am in touch with a local friend who has his own RO unit - just as you intend to do. I used to have an RO unit many years ago but couldn't get the throughput that I needed even for a 125 litre tank so I abandoned it. Plus, I'm now on a water meter.
I need to get some more information from this friend of mine. But, please note that he only gets 28 litres/day on a supposedly 100 litres/day setup. Moral of the story - don't take the published throughput figures at face value. I don't think he uses a booster pump but I await his answer on that.
I would have thought that water hardness will affect throughput. Our water is hard but not 23 dGH. The pre-filtration stages are very important as they remove substances before the RO membrane blocks 'stuff' at sub-micron level. RO units can even remove bacteria from the water!
I will get back to you.
JPC
P.S. What about the one shown attached? Bit too big, I guess!