Because that's like cleaning a frying pan without fairy liquid! Because of the oil's in your hair, its like greasy so you need to use shampoo to strip these bad oil's out. If you have long hair remember and use a conditioner as shampoo dry's your hair out.
It all depends on what is on it to make it dirty. If it is just from minerals in your water, it won't be too difficult. If it is dirty from soap scum, it could be a little harder to clean. It all depends on the power of the cleaner that you are using.
The principle is 'dilution': with the first addition of clean water to dirty water, the dirty water becomes less dirty because it is diluted by the clean water. With the continued addition of clean water to dirty water, eventually the dirty water will be completely diluted and there will be no dirty water left; it will all be replaced by clean water.
You can use clean tap water for your goldfish, but not dirty or used water.
to clean dirty water it needs to be cleaned or filtered
clean water is naturally dirty, it goes through a process in which then it becomes clean.
dirty
You could use a filter or if the water is muddy you can also use the method of sedimentation.
You can change dirty water to clean water by using filtration methods such as boiling, chemical purification, or mechanical filtration. These methods help remove impurities and contaminants from the water, making it safe for consumption. Regularly testing water quality and following recommended guidelines can also help determine when a change is needed.
Fresh water is not dirty because it is fresh and clean
no there have really dirty water . so dirty there died
In clean water.
it get's clean by sewige