Inexpensive ring - improper water chemistry.
Your pee will not turn blue if you pee in an outdoor swimming pool. Pee turning blue in a swimming pool is just used as comedy in the movies and is not likely to happen in real life.
gold ring does not turn black
Platinum ring NEVER turns black. Only sliver rings turn black.
Turn the pool upside-down and knock on the bottom.
turn the water yellow
haha, no Not just from dogs swimming in it. It can turn green because of the water being dirty. If it is your swimming pool it probably needs more chlorine or whatever you use for keeping it clean. If it is a kiddie pool just change the water.
Injuries to the head, hands, wrists and arms...Sometimes legs if attempting a backstroke tumble-turn or even a backstroke to breastroke turn. It was only today i injured my finger doing one of these turns; but these are the main fears of swimming backstroke in a swimming pool...
Too much iron in a pool can cause things to turn black. Speak with your pool shop about the right treatment.
Hair bleaches in the pool not because of the chlorine, but because of the metals and copper in the water. If the pool has a high concentration of metals and copper, then yes, it will appear or turn a faint green.
Most swimming lanes use a string of flags above the pool at a set distance from each end of the pool. The swimmers see the flags, and begin counting the strokes, having trained to begin their turn after a particular number of them.
It's not real. Swarovski doesn't turn black
Rusting