Growing Success Advanced Slug Killer, available from Notcutts is a blue pellet containing a naturally occurring active ingredient called Ferric Phosphate. The pellets can be used around edible & non-edible plants. On moist soil or in humid conditions granules take up water & begin to swell. Slugs prefer moist & soaked granules. Once attracted to & consuming the bait pellet, slugs cease to feed. They then crawl into the ground or a secluded location to die, leaving no unsightly trace of slime secretion & no necessity to collect dead slugs.