Salts CaSO4 3.2g, CaCl 2.0g plus a quarter tab of campden. Possibly oxidized when transferring, used the new in line filter.
Based on boiling 7.00 gallonsliters at 1.046 for 30 minutes, this will decrease your wort by 0.50 gallonsliters, bringing your after boil OG to 1.049. You wanted an OG of 1.055. It looks like it will be under.