I believe candi syrup has a SG contribution of 1.038 ppg. Which means for every pound you add to a gallon of water you get a .038 increase in SG. I think those bottles are 1.5lbs. 1.5x38=57/5gal= 11.4. In other words, in 5 gallons it should increase SG by 0.0114 for every bottle of syrup.
In process: Belgian Wit
Secondary: Berliner Wiesse
On Tap/Bottled: Strong Dark Belgian Ale(bretted),Belgian Imperial Stout (2nd AG), Partigyle Dry Stout, Apfelweinx2, Dont Fear the RIIPA, Cream of three crops
Planning: Roggenbier, Biere de Garde, Golden Strong Ale, Barleywine, Something with Brett