Salts CaSO4 3.2g, CaCl2 2.1g plus 0.3g Kmeta. 32mL 10% phosphoric acid in mash water. Mash ph was 4.3 and tasted tangy, dumped batch before boil.
Based on boiling 7.00 gallonsliters at 1.048 for 30 minutes, this will decrease your wort by 0.50 gallonsliters, bringing your after boil OG to 1.051. You wanted an OG of 1.054. It looks like it will be under.