[Farrmanchu]

Originally Posted by Atomikk

Give you a heads up on coral color with higher K values.

If you have 10K lights, the corals will naturally color up. They will sustain that colour as long as you keep the 10K lights on. As soon as you move away from 10 to 20K, the corals will regain their brown zoanthallae.. but because of the blue hues, the corals may seem colourful. I call it the fake colour..

I recently did a test in my tank regarding this.. and proved that corals brown out with 20K lighting. They look colourful, but they really aren't.

What I have done to my tank is run 2 10K MHs during the day (while I am out, at work, etc), and then at night 1 14K MH. This way my corals retain their colour and growth, and at night the tank looks nice and blue.

This sounds like getting the best of both worlds. Great tip!