Aquatic BioTechnologies 30127 Pond Shade-Midnight Blue - 8 oz. by Aquatic BioTechnologies. $22.64. Manufactured to the Highest Quality Available.. 8 oz. of Pond Shade - Midnight Blue can treat up to 4000 gallons of water successfully.. Great Gift Idea.. Design is stylish and innovative. Satisfaction Ensured.. The beauty of water gardens is often eclipsed by light penetration and excess nutrients. Pond Shade - Midnight Blue helps in retaining the attractiveness of po...