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  1. G

    98% Pure h2so4?

    The bottom of the thread I linked to above says it all. Besides, if you read up on the various acid types food grade sulphuric is the best as it has nothing the plants want, so the pH is damn stable unlike with something like Phosphoric or Citric. An excellent guide for this is at...
  2. G

    98% Pure h2so4?

    Well, for anyone wondering here is the ancient thread. https://www.rollitup.org/t/using-sulfuric-acid-33-pure-for-ph-down.505437/
  3. G

    98% Pure h2so4?

    Well, that was not what I asked now was it? Easy to get back then not now? WHY? I don't wish to be told what to get, or what not to get, I was asking a simple question about something that people easily got from Amazon, for instance, that now I can't find and was hoping this forum was as good...
  4. G

    98% Pure h2so4?

    I was reading a thread from 2012 on the forums about sulphuric acid (h2so4) and on Amazon it was cheap. 1 gallon DI/Distilled water and 1 tbsp of it would make the same concentration of pH down as GH's gallon for far less. The problem is I am no chemist, so I go on Amazon to find 98% pure to...
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