We at Sanco do not recommend this and encourage you to find learn the truth about pond dye and its applications.
Not all algae are harmful, such as chara which acts as a natural filter cleaning and purifying the water. Once you have determined the population of plankton or filamentous algae are at extreme levels causing a greenish tint or offensive odor, then an algaecide is needed. Used as directed, an algaecide is safe to humans, visiting animals, and most aquatic animals.
Sanco has been giving expert advice on many topics concerning pond maintenance for almost 20 years. You want to control algae in ponds? We have the information and product to eliminate this problem, Copper Sulfate, in liquid and granular form.
Give us a call or an e-mail about any question you have about our products.