Our constant mantra is that no poison is safe. Read the info here
Sluggo also kills earth worms.
A man-made chemical called EDTA, a chelating agent that causes the iron phosphate to release its elemental iron easily in the digestive systems of not only slugs and snails but of pretty much anything that eats it, children and pets and earth worms. EDTA or the similar EDDS are the only reason these baits are effective, yet interestingly the label only reads Active Ingredient: Iron Phosphate – 1%, Inert Ingredients – 99%. No mention is made of the presence of another chemical that can turn harmless iron phosphate into a deadly poison. Apparently EDTA was slipped through the cracks in our regulatory system as an “inert” ingredient, and inert ingredients do not have to be listed on the label. Since iron phosphate is harmless, and EDTA is the ingredient that makes it effective, not to mention dangerous.
A review of these products by the Swiss organic certification organization (FiBL) discovered the EDTA content and stated that these products were likely no safer than the metaldehyde baits, that EDTA itself was significantly more poisonous than metaldehyde, and even said they weren’t even sure that it wasn’t the EDTA alone that was killing slugs and snails.
The best solution I have found is to gather the snails in the evening or early morning. They like to hide in tall grasses or foliage so look for them there and reduce unnecessary tall foliage. Right after watering, during a rain and the early morning dew are easy times to find them wandering about. You also can place them in your compost pile because they love eating the old food. Rats, crows, ducks and chickens love to eat them. We also feed our snails to our koi fish in our pond. Collecting them for 7 days in a row seems to be the quickest way to bring down their numbers. Continue once a month your snail population will significantly come down.