Question about changing MH ballast

daniella3d · #12 12-09-2011, 05:16 AM

Most important thing for the yellow is lack of nitrates and phosphates:

I have no problem keeing yellow under my 250 watt 14k MH.

http://reefbuilders.com/2008/09/03/g...-vivid-bright/

Quote:

Originally Posted by Casey8

You are lucky with your corals, I have 2x400W with 2 actinic but all my yellow sps corals are still turning green color, I just can not keep them yellow. I have googled and found out that it is because I don't give enough light for them

I really don't understand.

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