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Message: [QUOTE="pepper2.0, post: 276744, member: 23849"] My AI said: "Diatomaceous earth (DE) used for pest control in gardens typically has jagged edges that are effective at killing pests by cutting through their exoskeletons and causing them to dehydrate. This type is often labeled as **food-grade DE**. On the other hand, the DE used in fish tanks is usually **calcined** or heat-treated, which smooths out the jagged edges and makes it safe for aquatic life. This type is more for **filtration** purposes and won't be as effective for pest control in your garden. So, if you're looking to use DE for pest control, make sure to get the food-grade variety with jagged edges." Good to know, thanks [USER=944]@Chuck[/USER] [/QUOTE]