Don't give them more than they can consume in a couple of days...then fermentation shouldn't be an issue. If they stop taking syrup, stop feeding. If you're trying to supplement a new colony to help them draw comb and they stop taking syrup, stop feeding for a couple of weeks, then try again.
They'll take 2:1 as readily as 1:1 but the 2:1 is a pain to make and unnecessary.
A forum community dedicated to beekeeping, bee owners and enthusiasts. Come join the discussion about breeding, honey production, health, behavior, hives, housing, adopting, care, classifieds, and more!