The only way we have ever been able to adequately soften our water is using sili-phos crystals. Very simple to use.... just place in tank. They attract out the calcium... then we dry them out.... bash off the calcium... and re-use quite a few times. We live in Kalkheuwel... Lime Hill in Old Dutch ..... and without this we would have clogged pipes.
blitz1976 wrote: The water is pretty hard....looks like there might not be a solution for this without using chemicals or a complex process at least.
I have been listening to a audio course by BM ...
Complete sustainability is my goal too..... as close as anyway.
Perhaps growing in proven alluminium-free soil is the only way to go with soybeans. Wonder if there is such a thing? Or using the soy plants for a number of years to pull it out the alluminium and then maybe OK.... ? Much like what you are wanting to do with your water. The problem is all the tesing required on soil and plants. I haven't a clue how to go about this and it would seem to be essential to really know you are achieving your goal. Continual sending away of samples is pricey here.