Customer satisfaction: In case of any query related to Hydra Liquid Black Dye, feel free to contact us. We will be at your service and try to provide an answer as soon as possible. How to use: Administering dye to your pond or water feature is as simple as pouring the correct measurement needed of dye into the water. It will quickly disperse within and around the pond and/or water feature, meaning no need to spray or spread the application yourself. Mirror finish: Hydra Liquid Black Dye gives a mirror finish to your pond anyhow, the water will be a deeper shade, and possibly opaque if extra liquid is added. Over time rainfall will dilute the colour to the point where it will all be gone. You can also add more water, or partially change water to dilute the dye. Economical: Hydra Liquid dye is food grade dye that is very economical to use. It acts as a pond dye that is also an algicide. It will reduce the sunlight penetration and eventually will reduce the growth of algae because it slows the effect of photosynthesis. Environmentally Friendly: The Hydra Liquid Black Dye is a pond dye water treatment that works in all ponds and water features either small or big. It is a water dye that is environment-friendly and non-toxic for fish, birds or other animals.