Coral dying, icp test shows no issues

[spearo0352]

I have a 20g mixed lps/softy tank. So for the last few weeks all of my lps and soft corals have been on decline after a period of rapid growth and apparent health. I ran an icp to sort it out but my results show nothing wrong with any of the levels in my tank. Nothing has changed from when my corals where happy/growing (lights, flow, dosing) but every single one of them is on deaths door and I have nowhere to move them while i sort this out.. Im about to give up on this tank.
salinity 1.025
alk 8.71dkh
ammonia, nitrite 0
no4 4ppm
po4 .08 ppm
temp 78
only somewhat irregular ressult was aluminium at 33.3 ug/l and while thats elevated it seems thats not enough to cause a complete crash of a tank

 

[vetteguy53081]

What test kits are you using?

many change in lighting, light schedule or water flow?
Softies often affected by high nitrates, phosphates or both which often trigger algae, and cyano

 

[Timfish]

More history would help as well as everything you're feeding and dosing along with all routine maintenance you're doing and any changes you've made with your equipment. But for starters I'd be running GFO along with small (~5 - 10%) weekly water changes.

Since it's my guess you might be dealing with something microbial, you're water parameters seem fine to me and if you haven't made any changes to your lighting since you added your corals,here;s some videos to help better understand microbial and nutirent processes.

"Coral Reefs in the Microbial Seas" This video compliments Rohwer's book of the same title (Paper back is ~$20, Kindle is ~$10), both deal with the conflicting roles of the different types of DOC in reef ecosystems. While there is overlap bewteen his book and the video both have information not covered by the other and together give a broader view of the complex relationships found in reef ecosystems

Changing Seas - Mysterious Microbes

Nitrogen cycling in hte coral holobiont

BActeria and Sponges

Maintenance of Coral Reef Health (refferences at the end)

Optical Feedback Loop in Colorful Coral Bleaching

Richard Ross What's up with phosphate"

 

[jda]

Go back to the basics. Make sure that your refractometer is calibrated, double check your temp whatever with something with mercury in it, dates on your test kits and change some water.

 

[spearo0352]

My schedule has been 10% water changes every week tank has been up and running for a year only issue was a cyano outbreak a few months back. Coral was back to being happy after that cleared up and most of the coral in my tank doubled in size over that month up until the crash which has been happening for about 3 weeks now. Most recent test is an icp so i know my levels are accurate. Temp is 78 and im running gfo. I have 2 clownfish and a watchman goby, cleanershrimp, and some astrea/nassarius snails. My hermit crabs and urchin have died off over the last week and now my corals are going. No signs of stress in fish or snails so far. I really dont know what it could be. I did a 50% water change yesterday as a last resort but theres no difference. Gonna bring my salvageable corals back to the lfs so they can hold/sell them for me and im probably gonna scrap the tank. I cant find the issue. Only things i have been dosing is red sea ab+, pyhto and iodide but ive been consistent with all 3 for the last few months so theres no reason it should be effecting anything now. I lightly feed my fish pellets once per day and have been changing the filter pads every week with water changes