I also bought a 50 micron iSpring centrifugal filter. Both are easy to install with a 20 micron carbon filter in between. Overall water flow and pressure are good. The water seems softer than before but still has a very faint metallic taste. I attribute this to the charcoal filter, not the two iSpring products. I'll probably need to upgrade to a larger activated carbon filter (iSpring WGB12B). The scale seems to be less, but I didn't pay much attention to it.
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