correct potassium nitrate...... and no your local pharmacy or fertilizer store WONT have either sulphur or salt petre but good news is they are for sale on trademe...and look to be finely ground....
correct potassium nitrate...... and no your local pharmacy or fertilizer store WONT have either sulphur or salt petre but good news is they are for sale on trademe...and look to be finely ground....
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