Help Hammer coral not happy

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ALAMOBIKER

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Hammer coral not opening and showing skeleton. What would cause this? Found my salinity was low at 1.20 so I made the proper adjustments to 1.26
My cal was at 300 buffed it to 400 ph is a little low 7.8

Pocket Marine Parameter Test Results from 2021/01/09 at 10:00
If you have any queries regarding your parameter levels, please do not hesitate to contact us


RecommendedResult
Temperature23 - 27 / 76 - 7976.8°f
Salinity1.022 - 1.0261.026 sg
AmmoniaUndetectable0.00 ppm
NitriteUndetectable0.00 ppm
Nitrate0 - 5ppm0.00 ppm
pH7.8 - 8.47.8
Calcium380 - 450ppm400 ppm
Magnesium1250 - 1350ppmppm
Alkalinity7 - 12dKH9 dKH
Phosphate0 - 0.03ppm0.00 ppm
Iodine0.06ppmppm
Strontium5 - 15ppmppm
Silica0 - 2ppmppm
Boron0 - 10ppmppm
Iron0.000006ppmppm
Sodium10,800ppmppm
Potassium390ppmppm
Copper0.0009ppmppm
Nickel0.0066ppmppm
Zinc0.005ppmppm
Aluminium0.001ppmppm
Sulphur905ppmppm
Lithium0.170ppmppm
Beryllium0.0000006ppmppm
Mercury0.00015ppmppm
Cobalt0.00039ppmppm
Cadmium0.00011ppmppm


C0BD3AB3-4FA8-4955-97D8-E51938AB0D78.jpeg
 
Zoanthids

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0 nitrate, 0 phosphate, both of which are crucial to the corals (at least some required in our tanks unless the corals are consistently fed), and a pH that is very low are all possible causes of unhealthy coral. Consider feeding more or using some sort of coral food. I would also consider something like brs soda ash for alk supplementing (it can help with pH) if you do currently dose alk. What kind of tank do you have (all in one, sump, etc)?
 
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