Drain your pool, then scrub the walls and floor with pool cleaner.
Algae build up from not enough chlorine, or it can be from metal going into the pool or an organic material left in the pool.. - OvenBaked_
I didn't know that there were swimming metal walls.
You drain the water then plaster the walls from inside
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.
Turn the pool upside-down and knock on the bottom.
That would depend on the type of light, the wattage, the shape of the pool and the size of the pool.
The color of the pool is no problem at all. If the water is green, who in his right mind would jump in?
This is very likely shampoo, soap and sunscreen
Steel walls are currently the lowest quality wall for a swimming pool, with the exception of Cyprus wood (if still available). Concrete (not gunite) is superior to any other wall, but a pool with concrete walls generally also has a concrete bottom. In other words, it is a concrete swimming pool. The most popular wall today for vinyl liner pools is fiberglass and, with the possible exception of concrete, is the best possible choice.
Acid
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.
a swimming pool it should be neutral pH ie green
'Swimming Pool', sometimes shortened to 'Pool'.