Enhance Maximize Plant Yield. Receive 1x 250ml of Miicrobial Mass for Free. When you use promo code “ENHANCE” at the checkout. Buy Now TERMS AND CONDITIONS: Limited quantities available • Limit 1 code per customer • Offer only applies to 250ml Miicrobial Mass size • No backorders, no booking future orders • Shipping is not included in the offer price • Orders to be shipped as 1 order or how the order was received.