Par reading

Depends a lot on what you have in it.
Sand bed could be anywhere from 100-300
Top of rock 350-500
 
What do you have for par numbers on the sand and on the rock?
What’s your alk , No3 and Po4?
 
Alk is 8 nitrates 5 phosphate 0.08 water surface its 600 to 730 depends on location top and middle of tank range from 380 to 540 rock on sand are in the 300 and sides are 200 to 280 and sand is 100 to 190
 
where the months are what do you have for par?
They shouldn’t bleach out that easily
 
post some pictures , what kind of light are you using? if the entire coral is bleaching then maybe too much light, if not I would suspect nudis . Pics are needed what is calcium and mag ?
 
Here they are
 

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But I have other that ate bright and growing well I've lost Oregon tort and strawberry short cake. But purple plasma pc raibown red milli Miami hurrance and other doing great
 
Too much light for monti


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What are your max setting for the light and how deep is the tank?


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