whaen is water hard or soft ?how to identify hard and soft water ? what are the characteristics of hard and soft water ?
^_^
The question that you have asked can be easily answered if you go through the following link:
whaen is water hard or soft ?how to identify hard and soft water ? what are the characteristics of hard and soft water ?
^_^
The question that you have asked can be easily answered if you go through the following link: