Water filter recomendation

Hello everyone, I am looking into good water filters, not RO unfortunately cause the budget does not allow me to get them.

So I was wondering what non RO filter you been using and what results are you getting, and are you happy with it. I was looking into BWT, BRITA, IX series, CTU PRIMA, and each has its pros and cons, so I want to hear your opinion and recommendations regarding non RO water filters. Cafe useses 30-40kg a week if you need to know what volume we go through. I am based in UK so that would be ideal market to look into.

Thank you for your time and help, have a good day everyone.