Growing out corals.

[Frank Infanti]

I tried to upload a pic but it's not working. Will try again. It's a 160g tank with 2 MP40 on opposite ends from eachother. One is at about 6" below the surface running at mostly 100% nutrient mode & the other is about 3-4" below the surface running mostly at 75% nutrient mode. Late night until early morning they are reduced another 20% & switched to constant mode.

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[gregzz4]

Yes, Frank's PO4 is 0.2 not 2.0
And his NO3 is @ 25

Yesterday I asked him to use a turkey baster on his corals and he told me a bunch of dusty crap blew off. Now I don't know if it was all over his corals, or just in spots where the tissue is gone, but either way he has high nutrients.

He reduced his lighting at my suggestion as I feel with the extra nutrients running his light @ 100% is most likely contributing to the crap on his corals. Plus, once basted they are exposed to all that high light and might bleach.

Frank, I think you've turned your light down a tad too much. We don't want to shock your corals. Try running your light around 75-80% to start with

[adam84]

I have been watching the effects of nutrient levels in my system for a while now and have found that colors seem to be best when no3 is maintained between 5-10 ppm, I know many would argue this is on the high side but it is working very well for me. The other variable that seems to have a large effect is not only light intensity but the photo period, how long are your lights running at 100% per day?