ANSWERS: 1
  • Lead-acid batteries contain 33.5%, pH Adjust (Down) contains 13-14%. pH Adjust (Down) is a fish care product. A car battery contains sulfuric acid which can be boiled or filtered to remove some impurities. However, a normal filter doesn't really work and boiling battery acid is also a way to risk lead poisoning. It's far too hard to safely make sulfuric acid.

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