pH adjsuted water with vinegar is completely safe and organic.

I have no idea about taste.

You just cannot have large batches of it made up as it will rise in alkalinity after a while again.

But it will work and again, organic os almost always safe.

I have a home softener system that removes everything, and the pH right outta the faucet is 10.7

I say your brita is a hunk of shit

(actually I know they are....for what they say they do anyhow....its all B.S.)

Vinegar is safe.