Even if it's safe from other yeasts, is there any reason to worry about any sort of toxins that other organisms like bacteria could have potentially made before eventually being killed off?
This is my first attempt at cyser, so I'm starting extremely simple and making two small batches: each is half a gallon. I used:
-1.25 pounds of honey into each container, or 2.5lbs/gal
-Lavlin 1118 yeast
-a little bit of yeast energizer
-in one of the containers, I tossed in two sliced kiwifruits just as a "eh, what the heck!" adventure
The OG (according to the mead calculator) to be around 1.120 for the one without kiwi, and 1.125 for the one with it. I don't have anything to measure the SG currently, but am thinking that may be a handy tool to pick up.