Spots on the glasses are usually what people notice first, but plenty of households call with a bigger question, what's actually in the water they drink and shower in every day. A test is the straight way to find out, and that's where this service starts.
San Diego has hard water. It carries minerals that can scale your pipes and water heater, film your shower glass, and leave skin and hair feeling dry, and most people have already seen it on the kettle. Treatment splits into softening and filtration. Softening addresses the minerals, protecting the plumbing and everything water touches. Filtration addresses everything else, taste, odor, and other concerns about what's in the glass. They're different systems for different jobs, and plenty of homes use both.
What fits your house depends on your water, your household, and what you're actually trying to solve, and that's a conversation worth having in plain English. The options get laid out, whole house systems versus point of use, what each actually does and doesn't do, what maintenance really looks like. Then you decide, at your pace.