Thc syrup

Hi everyone. So today iv made some thc syrup. Now the syrup it's self as worked. A treat it looks n taste like syrup. Minus the weed taste. My recipe was 750mil water. 750 gs sugar. 4 tbs spoons of corn syrup.. 40 gs of dry sieve hash. Decarbed.... Don't think iv put enough hash in.. So would I be able to put back on the stove and add more hash. Or is it best to just make a new batch n add both together.. Myt be a dumb question to some but not for me lol... Ty in advance. Happy toking eating. Vaping. Drinking. Of the magical herb