Which is better for treating pets and bedding?

Both are food grade and additive free. Orku's 20 µm powder and under 1% crystalline silica figure give you more to go on for fine dusting; Harris includes a duster, which makes application easier.

Which is better for the garden?

Harris, mainly on volume. A 10.5 lb bag goes further across beds and around the yard, and the included duster helps apply it.

Is the Orku powder finer than the Harris?

Orku states roughly 20 µm. Harris does not publish a particle size, so you cannot compare them directly.

DE has no expiration date, so both keep indefinitely if kept dry. Harris's 10.5 lb bag simply holds more powder.

Is the Harris worth the extra over the Orku?

At its $9.95 low on November 1, 2026, Harris is strong value for 10.5 lb with a duster. No Orku price was supplied, so check the per-pound cost before paying more.

Are both safe to eat?

Both are labeled food grade with no additives. Follow the label dose, and note that neither is a substitute for medical or veterinary advice.

Harris Food Grade Diatomaceous Earth vs Orku Fine Diatomaceous Earth - Food Grade FCC Fossil Shell Flour Powder

Both are 100% food-grade freshwater diatomaceous earth with no additives, so the choice comes down to package size, certification and price per pound. Harris sells a 10.5 lb bag with a powder duster included and full OMRI listing; Orku sells a finer, roughly 20 µm powder with under 1% crystalline silica and FCC-consistent purity. Harris's lowest recent price was $9.95 on November 1, 2026 and its highest $17.14 on November 2, 2026; no Orku price was supplied, so compare per pound before deciding.

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