Neptune's years are 164.8 Earth years. Its days are 16 hours and 6.7 minutes long. Although Neptune's days are shorter than our days, its years are still longer than ours.
Most colorants will last in your pond approximately 30 days. You may have to add more pond dye before 30 days if you have execissive rainfall, run-off, a heavy out flow, or evaporation. If your colorant is fading you will visually be able to tell and should add more dye to the water.
Best Answer: Generally semi-permanent hair color lasts 2+ weeks, depending on how often you wash your hair. If the Kool Aid is more like a demi-permanent it'll last about 4-8 weeks, again depending on how often you wash your hair. Hope that helps.