Dosing 2 parts in high concentration can and will increase salinity. part 1 has about 37,000 ppm calcium (calcium chloride) and part 2 has about 5,300 dkH alkalinity (sodium bicarbonate) per RHF recipe 1. Chloride and sodium are major parts of sea salts as the following image shows.
I think you over dose both parts. Per Randy, he suggests starting dosage of 1mL/gallon of each part in a heavy demand (SPS dominated) tank. Try to dose at 0.5mL/g and slowly increase from there. Measure calcium and alkalinity along the way.
