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.
How long does hair dye last? A: Semi-permanent hair color lasts about four weeks or up to 28 shampoos. Permanent hair color lasts until the colored hair grows out, but recoloring is neces... Full Answer >