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Customer Service

Ordering With Us

PLEASE NOTE: Due to recent events and social distancing orders, our office hours are limited.  Your patience is much appreciated.

  • Questions or Feedback by email: click here
  • By Phone: (800) 347-5211 or (805) 684-4525 Customer Service Hours are limited.
  • By Mail: ESN Group, Inc., Earth Science, PO Box 40339, Santa Barbara, California 93140
  • Please see our FAQ's for frequently asked questions

Payment Options:

We accept payment by Visa, MasterCard, American Express or Discover Card. Your secure credit card payment will be charged at the time of purchase.

Free Standard Shipping on Orders over $35.00 (except gallon sizes*)

Orders over $35.00, after any applicable discounts are applied, are eligible for free standard shipping. A $5.95 standard shipping rate will be added to orders equal to $35.00 or less. Or, select our UPS option for $7.95. *PLEASE NOTE: Gallon-sized products require a $9.95 per gallon delivery charge.

Orders are processed in the order received depending on volume.  Please allow extra time for shipping, handling and delivery.

Packages will be processed with appropriate shipping methods for your area.  All orders are shipped via standard Priority US Mail or UPS Ground. Shipping addresses located in Alaska or Hawaii are typically shipped via US Mail. Shipping addresses containing P.O. Boxes are also shipped via US Mail. Standard delivery time is 7 to 14 business days from the time your order is processed.  Allow extra time for busy holiday periods. Orders shipped to Alaska or Hawaii can take longer.

We are happy to ship your order within the continental United States, Hawaii, and Alaska only.  We don’t currently offer international shipping. offers service to Canada. offers international options.

15% off on Orders $100.00 or more

We are pleased to offer a discount of 15% off on orders $100.00 or more. The discount will automatically be deducted at checkout. Order total must equal $100.00 or more and may not be combined with any other discounts. Free shipping and discounts do not apply to gallon sizes.  Not valid during sale periods.

Recurring Orders ProgramAnchor

We have discontinued our auto-ship option on items at this time.

Returns and Exchanges:

If you are not satisfied with your or order, request a Return Authorization number within 30 days of the purchase date. When returning your products, include your Return Authorization number and a copy of your order confirmation or packing slip.  When received, we will refund the original purchase price of the product.  Refunds are issued in the same form as original payment type.  We are not responsible for lost or undeliverable packages.  Shipping and handling charges are non-refundable.

Products Not Purchased from this Website:

For products not purchased from or, please contact the place of purchase for refund, replacement, or exchange.  We can only accept returns made from purchases on our website.

We are aware of non-authorized parties selling counterfeit Earth Science products on Amazon®.  Regarding this issue, we are alerting our valued customers, retailers, and distributors that we are actively working to resolve this.

Please note that Earth Science will NOT honor its 30-day return policy for any product sold on Amazon® by non-authorized resellers.  We recommend that you use caution in buying products from non-authorized resellers as some of these products may pose a risk to your health and safety.