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For coffee my problem is that the water out of the tap is too soft. I can filter out the chemicals but am left with not enough hardness. Currently considering whether it might be possible to build good (consistent) re-mineralisation and still be non tank fed. Looking at beer related stuff just now

What are your water figures?

You could try adding some Glaceau to your filtered tap water. It's basically remineralisation. Maybe 3 parts tap to 1 part Glaceau?

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or look at BWT bestmin which looks to put back minerals into soft water?



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Their site only lists the premium to have the mg2+ tech the others just look like different levels of filtering... that's why I'm considering the premium as I'm in a soft water area so even using the blend valve won't raise the minerals to where I want

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John, has anyone done the numbers when using the BWT bestmin?


A couple of things I am not clear about when re-mineralising. It seems to me that a constant flow through a cartridge, however fast or slow, is going to produce a different result to water sitting for an hour or two in the filter as seems likely for the home user unless of course some kind of saturation point is reached easily.

I also do 

https://join.worldcommunitygrid.org?recruiterId=596475 Letting the idle processors on phone and PC help humanity

https://www.tapatalk.com/groups/vesuvius/ Even though I have a lever

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The bestmax premium does not add minerals. It removes some of the calcium and exchanges some of the rest for magnesium.


Oh so if your water didn't have much Calcium in the first place then you wouldn't get much Magnesium?

I emailed BWT cause find their descriptions aren't very clear what the difference of all the various filters are and doesn't give any figures on how much minerals they add/exchange...

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Oh so if your water didn't have much Calcium in the first place then you wouldn't get much Magnesium?

That's correct. As far as I'm aware, the only BWT filter that actually adds mineral content is the rather expensive Bestmin.

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hmm any thoughts on connecting a remineralisation filter afterwards like this?


This will increase GH and KH by precisely the same amount, with all the GH in the form of calcium. Personally I prefer around 100GH/50KH as recommended in Jim Schulman's insanely long water faq, but Volvic has roughly equal GH and KH (60 of each) and seems to be liked well enough here.

It might need a plumbed bypass to avoid adding too much though.

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Just now I'm using a mix of filtered tap water and some Harrington bottled water and is a nice improvement over just tap water so I definitely need some hardness boost in my water... guess my choices are either a remineralisation filter with some bypass control or manual mixing in of buffer and magnesium...

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So I received my TDS meter and my tap water measured 32ppm whereas my bottle of Harrington was 206ppm lol

Interesting to see when I add a tiny amount of baking soda the meter jumps to 400ppm and flashes red warning the water is not drinkable!

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