I tried to use some hydrochloric acid on the pool floor. This is in the deep end, so got one of those sticks with the acid holder on the end.
Didn’t work.
It looks almost like dirt. But it’s not. It won’t come out no matter what I have tried so far.
Didn’t work.
It looks almost like dirt. But it’s not. It won’t come out no matter what I have tried so far.