Wha'ts a good shower filter for hard water?

I am finding my hair is really out of whack and unmanageable. It's like a combination of dry and oily and course and thin and really hard to wash and clean and blow dry. I use both bumble and bumble seaweed to clarify (tried other clarifying sampoos as well) and neutrogena condition to moisturize everyday. And yet it is always dry and at the same time has buildup so its greasy/sticky when trying to comb and blow dry. In addition my combs and brushes get so much build up very quickly, it's like I have to clean them every week. I even have tried different dandruf sampoos like Head & Shoulders, Nixorel, and other prescription dry scalp shampoos. My hair salon stylist said that maybe it might be from hard water, which was something that she had in her old apartment and caused her to have really unmanageable hair at the time. I think this may be something for me as well because I notice that when I am traveling, I often have a really good time with my hair. When I'm on vacation, for example, I just air dry and it's fine. Or if I'm at a hotel, I notice my hair washes and drys very well even though the shampoo there is usually neutrogena and they just have a basic dryer. I wanted to find a good shower head that filters for hard water.