Response to another water question

A filter won't remove dissolved minerals, and neither will one of those magnetic or RF 'water treatment' clamps that people are conned into buying.
Domestic water filter jugs remove dissolved gases and some chemical contaminants, but again, they don't really tackle the problem of water hardness. If your water is very hard, I'd suggest buying distilled water to make up your processing solutions, or using tap water that's been boiled for a few minutes.
I recommend fitting a good water filter anyway, to remove particulates from the wash water. Mesh types aren't very effective unless the mesh catches particles smaller than 5 microns. The best filters use a fibre or granule cartridge, or a permeable membrane. You might be surprised at the difference a good filter will make; especially to 35mm negs.

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