Fish Only: 5500 to 6500 Kelvin for general viewing. Unlike plants, fish do not have a biological need for light, so they require less. Natural sunlight at noon has a rating of 5500 Kelvin.

Can fish live without light?

Aquarium fish do not need light and it is best that you turn it off during the night. Leaving the light on can cause stress to fish as they need a period of darkness to sleep. Too much light will cause algae to rapidly grow and make your tank look dirty. So the short answer is no, do not leave your lights on.

Do temperate fish need a heater?

What is a Fish temperate tank? ... Temperate is a water temperature between 18-22 degrees, so in most homes this is the average room temperature. This mean temperate set-ups do not need a heater included, as long as the temperature stays between 18-22 degrees naturally.