Need help please.

Emptied my salt water pool.It is an infinity pool, it has some white streaks on the outside.

1/ I was going to acid wash the pool, which acid please?

2/ White marks? Scrub, acid?

Thanks.

Best to clean it when full and running. The white marks are effloressence typically, caused by wet / dry cycling. If you clean it while running, the running pool water will keep it wet and cut down on the marking. There is just one type of acid to use, call muriatic acid (grot gluea).

Thank you.