Clarification needed. Are you talking about a swimming pool?
Yes , it is safe to leave a night light on all night , however it depends on the size and the bulb.
There is no reason why you couldn't peel vegetables the night before they are to be used. Just make sure you cover them and don't leave them exposed over night.
every night do not cover it in the day though or they will not go to bed at night
If you are a peasant you use a blanket to cover yourself at night, the same as anyone else.
Coralline algae is classed as a red algae. Red algae is unique because it has adapted to be able to photosynthesise not only in light (producing O2) but also in darkness and at night (producing CO2). This means that coralline algae can still thrive in low light, as long as the water has a high enough oxygen content.
"Give you leave" means I will leave you now.
No need. Algea feeds from light. Just leave your aquarium light on longer and it will grow pretty quickly. Just be sure to turn your light off some to offer your fish a normal day/night cycle.
Algae are plants and produce oxygen from carbon dioxide when exposed to sunlight by photosynthesis. At night they produce carbon dioxide though cellular respiration.
The cover of darkness.
A quilt cover is the other name for a duvet cover. The quilt cover is the bedding that people cover themselves with at night to protect them from the excessive cold.