Not likely
3800 gals of pool water shock it with 1 gal bleach
Clean your filter!!
Pool Shock
Shock it with chlorine shock at the rate of 1lb per 10kgal.
It is chlorine reacting with the metals in your pool water.
Algae
Shock it. Sold at Walmart, Lowes, or possibly your grocery store.
No; green hair is caused by copper pipes. Just rinse your hair in water that has not gone through the pool plumbing after swimming.
Backwash first then shock. If you shock and then backwash you will be throwing away the shock you just put.
The shock will work better if the pH was within the correct range, but get the shock in asap, then do the pH.
It may kill the algae but the algae needs to be filtered or the pool will remain green and cloudy You need to dissolve the chlorine and pour around the pool then brush the pool in order to not damage your plaster. This will help get the chlorine throughout the pool.
Shock treatment for the green part. If it is still cloudy you can add a clarifier sold at your local pool supply.