SOMEONE TOLD ME TO BE SURE TO GET DIATOMACEOUS EARTH AND NOT THE KIND USED FOR SWIMMING POOLS .ALL I FIND IS CALLLED DIATOMACEOUS EARTH BUT IS IS FOR POOLS . IS THIS THE RIGHT KIND. THIS WAS AT HOME DEPOT. IF NOT WHERE DO I FIND IT? ALSO, CAN'T FIND CITRONELLA OIL EXCEPT OF LATERENS WHICH WAS TOLD NOT TO USE. WHERE CAN I FIND THE PURE OIL? THANKS