The Daily Dose Equine GI Sponge 1 Bouillon Cube for Horses improves calcium utilization and helps produce higher levels of digestive enzymes while lowering levels of internal parasites. The GI sponge is a bouillon cube of natural elements, including minerals that are biologically available and deposited by nature in a unique colloid. Mined in the Southern California Desert, this product has a physical attraction to various contaminants, such as coliform bacteria, nitrate-nitrogen and ammonia. The GI sponge also acts as an effective buffer, assisting in normalizing the critical acid/alkaline balance and lowering stress. It weighs 108 oz. Keep your horses happy, healthy and feeling their best with this horse GI sponge.