recipe is for a gallon but only did half a gallon so halved the amount I put in (2.5ml)
Is this the recipe you used? It's from an old post via the search facility
Emulsified thymol pre mix.
30g thymol crystals placed in honey jar,add 5ml of isopropyl alcohol to the crystals,place jar into a water bath of boiling water to speed up the dissolving process.
In another jar pour in 140 ml of boiling water and add 1 teaspoon of lecithin granules, stir well,and place this jar into a water bath of boiling water,stirring often for abot ten minutes or so until most of the lecithin granules have dissolved,you can then strain this mixture through a teastrainer or similar to remove any granules that have not dissolved fully,then simply add the dissolved thymol to this mix,and shake well,will look just like a jar of milk.
To use add 5ml to each gallon of syrup and stir well,syrup will go milky,unlike when using the old original mix.
If the mixture forms any crystals at a later date,tip into old small pan and reheat,do this outdoors.
There are also other feed supplements availible such as vita feed,and nosevit ect,i have never tried these so cannot make any comment on them,but i will sure be sticking to what i know works well.
Ps in the past i have on occasion added two teaspoons of the old original mix 10ml per gallon with no ill effects on the bee's at all,but 5ml is plenty.