Citric Acid 50/50 (liquid 50% citric acid/distilled water) 4 oz. Activator for WP and WPD. The new protocol 1000 is suggested by JH in his March 2010 mms newsletter. It contains a full 4 OZ clear bottle 50-50% of citric acid dissolved in distilled water and it is exactly enough to activate the regular 4 oz. size of WPD. It activates in 20 seconds to one minute.