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Old 11/09/2017, 09:02 PM   #1
lilphil26
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Sudden phosphate rise result in brown sps?

I recently checked my phosphate with the Hanna ulr checker and found out my phosphate was 0.01. I brought it up to about .05 in just under a week but my birdsnest coral is browned out now. 0.05 I don't think is high for phosphate and funny enough, my other sps like montis are much more colourful now with the increased levels. Do you think the browning out is because of the relatively quick increase? Lighting is radion xr15 G4 running ab+ at 70 percent over a reefer 170.


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Old 11/10/2017, 08:54 AM   #2
Timfish
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I know Birdsnest is can be happy with much higher levels than that but I wonder how bright your lights are? If it was not getting enough phosphate to grow zooxanthellae AND it's under lower light, like 50 - 100 PAR, it may have browned because it's grown more zooxanthellae. What you were seeing before was colors induced by being partially bleached from lack of food.


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Old 11/10/2017, 09:15 AM   #3
lilphil26
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The browning seemed to happen when the phosphate rose to .05 and the birdnest had no browning but were pale which I thought was due to low nutrients. Nitrate is at 5ppm and lighting is a xr15 G4 running ab+ at 70 percent


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Old 11/10/2017, 09:19 AM   #4
mcgyvr
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I would agree to potentially low nutrients AND low lighting..
You increased the nutrients but the lighting is still low resulting in the browning..


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Old 11/10/2017, 10:06 AM   #5
lilphil26
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Ok thanks guys. I will bump up to 80 percent over a few weeks and see how it goes. I'm trying to keep phosphate around the .04 to .05 level


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