I grow around 1/3 of my own food. Yes all with RO water. I'd like to get above 50%.

Specifically produce, however we grow most of what we eat. We pressure can, dehydrate and ferment to preserve. I have background and decades of experience in growing, which is to say it's more than just standard hobby garden level.

The RO water is not to avoid microplastics (although that might a side benefit) but rather that the water is highly mineralized. It would be a long post to explain why I do this. Some is theoretical health concerns, some is more practical.

This is really interesting. Do you have suggestions how to use RO in garden scale? (Like link where could I start)

I built my own RO system it cost around $1500 including a water softener. There are some ongoing supplies every year, maybe $200 or less.

I don't have any links I just figured it out, but it's not super complicated. I made it out of undersink RO membrane housings (housings from those little RO systems you can buy for around $300 that do a couple of gallons a day). The membranes have pressure pumps in front of them that get it up to a couple hundred gallons RO water total a day.

Basic steps are 1) Soften the water, 2) Pass it through very tight filters (like 1 micron), I also carbon filter for organic contaminants, 3) Booster pumps put water through osmosis membranes and from there into a storage tank.

I just used plastic totes with gravel in the bottom to house the membranes and booster pumps.

I should write up a blog post on it one day because professionally installed osmosis can be expensive.

Thanks!

Interesting, thanks!