Barley Peat Extract by Tetra $15.99 16.9 oz - $15.99 Size 16.9 oz 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity We are currently experiencing temporary outages for select pet products due to vendor shortages out of our control. We may contact you after placing your order to make substitutions or to update you on your order. We apologize for any inconvenience this may cause you. Add to cart Tetra Barley & Peat Extract naturally clears water. Convenient liquid releases humic acids and replaces messy barley bales. Maintains the natural beauty of ponds and waterfalls and reduces pond maintenance.