Hard Water and Tangles

Hi Peoples;

When staying with my boyfriend I noticed that my normal shampoo causes tangles that I don`t normally get at home. I figured out that it must be the harder water that is in his area. (We live in different cities, but only 30 kms away). I know there is a water softner that the water runs through, but the water is very hard.

My hair knots horribly and as I`m growing it out I don`t want to damage my hair (its at the mid point of my bra strap).

I`ve tried leaving the conditioner on longer. I`ve tried using a leave in conditioner. I`ve tried using a spray after and a dangler product and I`m at my wit`s end.

Are there other people out there in a similiar situation? What kinds of products do you use?
Any suggestions would of great help.