Lps dying

I have a 350 gal reef tank with mix corals sps and Los and my params are perfect but my acans and favias are all dying I don't know why. Any ideas

 

sostoudt

 

What type of lighting are they under?

Are they in direct light?

Can you post a picture ?

What fish do you have and inverts?

TIA

 

Please give the exact params. When is the last time you changed bulbs? Any changes to the normal routine? Have you changed products?

Pics of the corals in question will help also including a shot of all of them if possible.

 

Well if it makes you feel any better all of my corals died in under a week XD but yeah list your parameters. Seems like you're pretty experienced so that's a little weird IMO

 

nice list sostoudt :smartass1

 

Temperature: 80
PH:8.2
Ammonia:0
Nitrite:5ppm
Nitrate:0
Salinity:.026
dKH/KH/Alkalinity:12
Magnesium:1500
Calcium:460
Phosphate:0
Test kits you own:salifert
Liquid or Strips:liquid
Brand Name:
Are they Expired?:no


Tank size?350
Estimated total system?425

Reef
Current inhabitants? What and how many? lots of tangs, chromis, one emperor angel
Clean up crew?huge crew of crabs and snails

How long has your tank been set-up?almost 2 years

Substrate.
Type? sand and coral
Depth?1.5 inch

Live rock?
How much? 800 lbs
Did you recently add some?no

Filtration.
Type?pre filter
Protein skimmer?two skimmers, octopus, mrc 3
Do you wet or dry skim?semi wet
Maintenance schedule for filtration?weekly to bi weekly
Drilled tank/hang on back overflow? drilled
Sump/refugium. What's in it and how much?
Macro? What kind? no

Lighting.
Lighting type?3 175w MH ushio 15k
Age of bulbs? 2 months, and used to have 8 t5 ice caps but both ballast went out and they dont make them any more so trying to figure it out

Feeding
What? dayly mix of reef snow,red and green alge, mysis, silversides, krill
How much?
How often?

Water change schedule.
How much? 50 gal bi weekly I know its bad
How often?
What salt brand? red sea coral pro
Water source? RODI

Additives/supplements used?

Do you have a ground probe?no
What kind of flow does your tank have? alot of flow

Any additional info you would like to share.... Including anything different that you have done/not done. i had an alge bloom and turned the lights down a couple weeks back to get it to quit and lost a few fish out of the blue but havent had any fish die for a while

 

It could be the change of lights. I bet the 3 MH are much brighter/intense than the T5 was. Light shock?

Not sure why you're reading Nitrite. Maybe I missed it, but can you clarify how old has the tank been established for?

 

I am leaning to lighting changes. You should be able to replace the T5HO ballasts with Sylvania or Philips just won't be overdriven. I think between the lights out period and the loss of the ballasts that is your problem. Get a good T5HO ballast on there pronto. You might get lucky and find some 660's out there also. The 175W bulbs are good to about 18" penetration the T5HO were good to 30". You will need 250W or 400W MH to replace the T5HO you lost.

 

My money is on the lighting as well. Also the alk is on the high end, for LPS I would probably shoot for 9 or 10.

How far away from the lighting are they?

Sorry for all the questions. :-/