Removing Vinegar FliesVinegar Flies are a good indication that your worm farm is too acidic. To fix, just sprinkle a little dolomite lime, garden lime or wood ash.
Removing AntsIf you have a Styrofoam box worm farm, simply elevate it off the ground on bricks inside a tray of water - you could use deep sided pot plant saucers for this.
If your worm farm has legs, do the same with a tray of water under the legs.
When ants become a persistent pest, put out small piles of cornmeal. Ants will eat it but they will not be able to digest it, so it kills them. Be patient as it will take around a week to work effectively. It will not harm your pets or children.