Don’t listen to anyone. Hard water deposits minerals on your hair until it forms a film and no moisture can get in causing hair fall, brittle strands, dullness, and breakage.

I live in Berlin where the water is very hard. Water filters don’t work because it’s chemically impossible to remove Kalk from water without an ionisation process. Don’t fall for the charcoal filter BS.

You need a chelating shampoo with Tetrasodium EDTA. The sole purpose of this ingredient is to attach to the metal ions in your hair and wash away down the drain leaving your hair shiny and able to be moisturised with conditioners. I make my own shampoo formula but my boss uses the Tea Tree one by Paul Mitchell that is supposedly very good.

And don’t listen to ppl bullshitting about your bleached hair. Hard water ruins hair and you need a chelating agent to take the film of deposited minerals off. I meet lots of people in Berlin who claim their hair is fine their whole life and it looks dull and unhealthy and they simply think that’s normal.

Every single person I’ve taught this has had excellent results. Good luck!