Bjornsen Ultra-Concentrated Midnight Blue Pond Dye 1 Qt Liquid (12-Pack) | Liquid pond dye enhances water color reduces sunlight penetration is safe for aquatic life and improves pond appearance.

- Treats as much water as a gallon of other diluted pond dyes - Decreases sunlight penetration into the depths of your pond - Safe for all aquatic & domestic life - Pond dyes also improve the aesthetic of your pond by coloring brown water a more pleasing color