I was hoping to buy bottles to take away in the cafe. Shoot!
As for the pectin issue, heating fruit will usually result in a pectin haze so adding it to cold liquid will reduce this effect. What can also be beneficial is adding pectic enzyme to the batch before adding the fruit. Waiting is another option for clearing a batch. I recommend adding the fruit to cold liquid to reduce the pectic haze but also to retain as much of the delicate melon aroma and flavour that would surely be lost during the boil.