Another way of combating algae is to block the sunlight it needs to grow. By tinting the water blue, it not only reduces sunlight within the pond but enhances the appearance of the pond by providing an attractive blue background for water lilies.
Pre measured quick dissolve tablets simplify pond care. One tablet treats 50 gallons of water. Creates a blue hue in your pond. A safe, non-toxic water conditioner that shades the water blue as it protects your plants and fish. 20 tablets
Lake and Pond Colorant - 1 gallon treats 1 acre with an average depth of four feed. Water becomes a pleasing blue color. Ingrediants: Blue #9 Dye Concentrated.
AQUASHADEŽ is a blend of blue and yellow dyes specifically designed to screen or shade portions of the sunlight spectrum (red-orange and blue-violet) required by underwater aquatic plant and algae growth. 1 gallon
Aquashadow is a blended formulation of water soluble dyes designed for use in smaller lakes, ponds, decorative water features and other impounded bodies of water with limited outflow. 4 packet box (each packet is 7.15 oz)
Pond Shade 16 oz by Clear Pond is a non-toxic coloring agent that will make your pond water a beautiful lagoon-black. Pond Shade 16 will not harm or discolor ornamental aquatic plants or fish. 16 oz bottle treats 12,000 Gallons
A safe, nontoxic water conditioner that creates a beautiful blue hue in garden pond water. As it shades the water blue, it protects plants and fish from extreme sunlight by reducing light (UV) penetration into pond water.