A beach home deals with 2 problems at once. Inside the pipes, the county's hard water leaves scale in the lines, crust on the fixtures and scale in the water heater. Outside, the salt air is hard on everything. Imperial Beach households live with both, and the treatment conversation here starts with the water itself, because that's the part a system can change.
Treatment splits into softening and filtration. Softening takes the minerals out, and you notice it all over a beach cottage, less scale in the plumbing and the appliances, glass that rinses clear, and showers that rinse clean. Filtration addresses the rest, taste, odor, and the bigger question of what's in the water. They are often combined, and the right fit depends on your water, your home, and what you actually want solved.
Getting to the right fit is a plain English conversation, and the scale on your kettle and shower door is usually where it starts. You hear what each system does, whole house versus point of use, and what maintenance looks like near the coast. The decision stays yours, made at your pace. There's not much anyone can do about the salt air outside, but the water inside is something you can change.