Fastest way to acidify?

[Worth1]

Okay I am back and at home.
The only thing I have had high pH problems with was my raised beds.
I might have a high pH problem with my containers due to the calcium in my water but I cant say for sure or even how I will attack it.
Vinegar is not a permanent solution and I have no idea how often it should be used in containers.

Now some time ago a person had the problem in their containers.
I suggested vinegar.
I was immediately reprimanded by someone else that isn't here any more I was giving out false information and it would kill the plants.

The person did it and they sent me a PM back thanking me for the idea and how much better the plants looked.
This has happened several times by people here not coming back publicly about the advice but in a PM.
I dont really care one way or another what the reasons are they dont but that is how it is some times.

When it comes to containers If i were you or any one else I would listen to AK Mark as well as a few others.
They know what they are doing.
My way is a cheap fast way to tell if you are on the right track.