How Many Hours Light Do Corals Need?

Do blue lights grow coral?

All blue leds at a high enough PAR will keep corals healthy and they will grow.

But they may not be as colorful as they will be if they get other wavelengths of light.

The zoanthellae (algae) that our corals grow inside the polyps use mostly blue light and a little red for photosynthesis..

How long should LED lights be on in a reef tank?

10-12 hoursIn essence, don’t let your lights run for as long as they have been. Most hobbyists run their tank lights for 10-12 hours total.

Can you leave moonlights on all night?

Total darkness is definitely not harmful to fish and losing some color in total darkness is normal. I have my blue LED moonlights set to be on for 2 hours after the main lights go off. This alows me to observe the activity of my nocturnal catfish. However, it’s healthy for fish to have some period of total darkness.

Do corals close at night?

some corals close up, some stay the same, and some will extend feeder tentacles at night.

How much light does a coral need?

Over the years hobbyists have discussed crude measurements of the amount of light corals need to thrive. Most successful reef aquarists will use about 6-8 watts of light per gallon of tank water, more in deeper tanks and less in shallower tanks.

Do corals need white light?

corals use more of the blue white and humans use more of the white. but take that with a grain of salt, corals can utilize a lot of the light spectrum, however blue light is more useful then white light.

Do Zoanthids like high light?

You have to be careful with LED’s too bright can melt them away, especially zoas. As for some paly’s like my BBEB loves the bright lights. I have been running T5’s with LED supplement.

Is blue light good for fish at night?

Can Fish Sleep in Blue Light? A blue ambient light in an aquarium is meant to mimic moonlight. They are a great addition to any tank as they don’t affect the day and night cycle of the fish or plants and don’t contribute to the growth of algae.

How many hours of light do you need for SPS corals?

The general consensus is that a PAR of 450-650 umol is good to maximize the color for most of our sps. In my own experiment this summer where I set up a tank so that it would receive direct sunlight for 4-6 hours per day, during this time the light PAR on the tank reached over 1250 umol.

Do corals need light at night?

The majority of coral growth occurs during the day as a byproduct of photosynthesis which is a means to regulate ph inside the coral tissue. Very little calcification occurs during the night. Complete darkness is not necessary, nor natural.

Do corals need red and green light?

So basically when it comes down to it your coral will thrive under any of these: Red light, white light, green light, blue light, UV light…. or any combination.

Is t5 better than LED?

LEDs also offer increased light efficiency when dimmed as opposed to T5 fixtures and usually produce more lumens per watt in general, which decreases energy usage and thus, energy costs. A lower wattage of LED luminaire will usually be just as efficient, sometimes more, as a higher wattage T5 lamp.

Do ZOAS need feeding?

Feeding zoas For fastest growth of these corals, it is recommended that you feed them periodically with an appropriately sized food, although feeding is not usually required. … The polyps will fold inward, the mouth will open, and the food will go inside. This is the fastest and best way to grow these corals.

How many hours of light do ZOAS need?

8 hoursTry and suspend the light at least 16 inches above the surface of the water. After a month or so and the zoas have improved, you may incease the lighting to 15%. Do not go any higher on this size tank. Put the light on a timer for about 8 hours per day.

What color light is best for coral?

Fluorescent Pigments Due to its underwater environment, coral has adapted to grow best using light from the blue end of the spectrum in photosynthesis, and because of this, most fluorescent coral will glow green or red.

Do ZOAS need lots of light?

SPS and zoas both come from many depths and light qualities in the ocean. So many Zoas will do well in high light but need to be acclimated to those conditions. Yes you are correct, deeper water corals like more blue light.

Why is my coral turning white?

When corals are stressed by changes in conditions such as temperature, light, or nutrients, they expel the symbiotic algae living in their tissues, causing them to turn completely white. Warmer water temperatures can result in coral bleaching. … This is called coral bleaching. When a coral bleaches, it is not dead.

Why are my Zoanthids so small?

Lighting may be an issue. They may be getting more than they want, they don’t open as much or become smaller if they are getting more light than they want. The lights sound like a good culprit as they are very dark blue zoas and they have lost a little color (some,not much) as well.


In taxonomy, the terms “LPS” and “SPS” aren’t even used. Stony corals all fall under the Order Scleractinia. While what we consider soft corals (anemones, zoanthids, corallimorphs) are all under their own different orders.

How long can Corals go without light?

OP, seven days is fine. Corals have evolved for millions of years to withstand long stretches withno or very little light due to storms.

Can I turn my saltwater tank light off at night?

You can shut off your aquarium’s lights anytime you want, so long as they’re consistently on for about 12 hours and off for the same length of time. Most aquarists prefer shutting them off at night because they would rather see the tank lit up during the day.