How much uv light?

I've got nems. 1 was really really bright when a friend got it. It split and when I was waiting to get the split 1 it decided to take a trip into his wavemaker, so by the time I got it it wasn't anywhere near its best and was very very dull. It was growing and getting a little brighter before it took another pilgrimage though a wavemaker, where everything bar its foot was turned into soup. Everything is on the mend and I've got a bit of a bug for BTAs, I've got another 2. 1 was from the LFS and doing fine and the other was a brown blob when I got it of someone. This 1 has gained a good bit of colour but not entirely bright and I want the best for the nems. So off late I've been trying to do a bit of research on how to get zooxanthellae to populate. I read an article yesterday, I think may have been done by yourself on zooxanthellae. It explains what it is what it needs, that's why I know I need manganese as I have had a ATI water test done and I know I'm low on manganese. What it doesn't explain is ( for the stupid amongst us ie me) what are the best ways of getting it populate in coral. It explain it needs light, food source ( I think) and flow. But I suppose I'm looking for people that have actually thought along these lines and not just what lights are best for coral and filtration & the likes. Do people think what's best for zooxanthellae so they can get superbright coral.

I think water chemistry plays a bigger part in bright corals than lighting within reason that is. Light intensity and spectrum can make some colors shift and bring out other colors, but ime it's the chemistry that makes them bright - aka not browning out the corals with high phosphate and such.
 
I think water chemistry plays a bigger part in bright corals than lighting within reason that is. Light intensity and spectrum can make some colors shift and bring out other colors, but ime it's the chemistry that makes them bright - aka not browning out the corals with high phosphate and such.
The zooxanthellae in the coral is what makes them bright. I know it's water chemistry, but I was wondering about specifics. Im maybe over thinking it, trying to turbo charge the zooxanthellae in my nems.
 
The zooxanthellae in the coral is what makes them bright. I know it's water chemistry, but I was wondering about specifics. Im maybe over thinking it, trying to turbo charge the zooxanthellae in my nems.

If you too ambitious and make the zooxanthellae grow too much you get brown coral. That is why get browning with too many nutrients, particularly phosphate.
 
As ye can see it's not as orange as it should be. That's the 1 that I got that was all brown. The 1 that took the trip through the wavemaker only peeks out now during the day.

DSC_1122.JPG
 
The uv light doesn’t effect the coral that much. You can have them high depending on what colors you like
 

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