Pro-Sweet has both binomial (bees treat these like nectar) and monomial sugars (bees treat these like honey) so it will not only stimulate the bees but help them put on weight. Pro-Sweet won't crystallize or ferment like sugar water, plus there is no more going through the check out line with a cart full of sugar or making a mess of your kitchen! Also avaialbe in 5 gallons in store only.