My live rock is white

[siggy]

I'm losing all the coralein algae on my live rock my calcium is shooting at 500 ppm
Alkalinity is at 9.5 using redsea testing also API is close.been doing 25 percent water changes weekly, heavy bioload losts of zoas leatherc frags 8 fish snails crabs in a 40 gallon uniqarium. 1 cap each every few days seachem iodine and magnesium no skimmer what's up also adding 3 oz live bacteria after water change.
WYT

 

[Randy Holmes-Farley]

None of the chemicals you mention is an issue (although some are probably not useful either, such as the iodine)..

When was the rock added? New live rock often dies back.

 

[saltyfilmfolks]

That.
Corraline wil die off out of the water to long.
Also How high is your par. A lot of folks lose purple corraline under high light.

 

[siggy]

the recent additions, corals on rock with nice coralline i see the bleaching starting at the extream edges, im running a maxi spek 10k 160 watts with factory stand i pick up a seneye yesterday for the par meter that's tonight's task.
thanks for your time