LPS dying slowly

[Uncle_Bob]

Hello all,

Many of my lps started dying from their edges, and can see the white decaying tissue. Some of them like scoly still has good polyps extensions and pop flesh but the skeleton still exposing gradually. My acan sometimes still blooming but also dying slowly too. I’ve tried to dip with seachem iodine dip, but couldn’t stop them from dying. Some of my lps like torch and goni looks ok, and sps are doing fine too. Does anyone know what causes my lps keep dying and how to rescue them? trace elements? Infection?nutrient?

parameters:

pH 8.2
Phosphate 0.00
Nitrate 0.6
Alkalinity 7.1
Calcium 536
Magnesium 1295

 

[Mr. Mojo Rising]

alkalinity is very low. Nitrate and phosphate are very low, the corals are starving.

How old is the tank? How long have you had the corals? What kind of light do you have? What do you have for flow in the tank?

Corals need light, flow, and nutrients to thrive. If the corals are dying, then one or more of these 3 is missing.