What is a penis rash? There are multiple conditions that can cause a rash on the penis or in the groin. Rashes are commonly itchy and can be caused by something as simple as an irritation to certain soaps or something as complex as an infection caused by fungus, an STD or pubic lice.
Purple on the fixtures and fittings and plaster = very high chlorine stabilizer or conditioner levels. It can also be caused by metals and/or minerals in the water, particularâ¦ly manganese. The manganese reacts to the high level of chlorine (when you shock your pool for example) and turns the water purple.
These local deposits of metal could cause a discoloration of the pool surface in that area. Also, some common algaecides used in swimming pools contain moderate amounts of copper, and when used in excess, can cause staining (usually blue or green) of the pool surface. High concentrations of iron can cause general rust spots to develop over large area of the pool surface.