Iron? == == Possibly a slight blockage allowing toilet water to ernter the waste line of the tub
You have to pee when you get in the bathtub because the liquid of the water gats you thinking about peeing, plus the temp. of the water causes your blatter muscles to relax.
soap scum sticks to the side of the bathtub witch causes bathtub rings to form.
Dirt
The water looks colorless when in small quantities but it has actually a very slight blue hue to it. This can be tested with a glass of water and a filled bathtub: the former will appear colorless while the latter will be faint blue.
It depends on how big your bathtub is.
Insufficient water pressure or incorrect pipe sizing
No, too high of water pressure causes problems.
That depends upon the volume of the object that is put into the water in the bathtub.
It is actually faint blue but it is only perceptible to the human eye in large quantities. That's why water looks colorless in a glass but not in a bathtub, for example.
When you bathe the dirt and soap floats off your skin and sticks to the side of the tub, leaving a ring when the water is drained.
Yes in fact if u put your turtle in the bathtub u have to put salt in the water due to their salt water habitats But if you put a turtle in the bathtub the water mst be a perfect 65% Farentheit
the bathtub