andy36yr19
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- Oct 7, 2018
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You could add a small piece of limestone or shell and it will raise the pH, however you only need a small piece otherwise the pH will go too high.
Big pieces of limestone have a bigger surface area and will raise the pH faster and higher than a small piece. You might need several small pieces to get the pH to just above 7.0 but if you add 1 small piece and monitor it for a week, it should raise the pH a bit. If the pH hasn't changed after a week then add another small bit.Adding a small bit is the same as adding a big bit, it will dissolve at the same speed.