Tank Crash!!-any Advice?

[JODOG]

MY TANK HAS CRASHED, 120G, G2 SKIMMER, MH'S, 50LBS LIVE ROCK, 4" SAND BED, STERILIZER, BIONIC EVERY OTHER DAY. I DON'T KNOW FOR SURE WHAT IT IS, BUT IT STARTED WITH MY XENIA. AND THEN ALL MY OTHER CORALS SLOWLY STARTED DYING. THE SYSTEM HAS BEEN IN PLACE FOR ABOUT A YEAR AND NOTHING ABNORMAL HAS HAPPENED UNTIL NOW. I DO REGULAR WATER CHANGES OF 15 GALLONS A WEEK. I HAVE TRANSFERRED ALL MY CORALS THAT ARE WERE STILL ALIVE BUT SOME THAT I COULDN'T MOVE HAVE DIED. ALL WATER PARAMETERS SEEM TO BE OK, BUT ALL OF A SUDDEN I HAVE THICK ALGAE DUST ON MY INSIDE GLASS, I HAVE TO CLEAN IT EVERY TWO HOURS TO DEEP THE GLASS CLEAR. PLEASE GIVE ANY SUGGESTIONS FOR HELP, I AM AT MY LAST WITS END. THANKS!!!

 

[pledosophy]

What are your ammonia, nitrate, PH, and calcuim readings. Seems to be O.K. sounds worrisome.

 

[erc111]

turn your caps lock off and you may get a response

 

[outy]

what are your parameters, there off trust me there way off

 

[Sk8r]

SOmething's off---are you using ro/di water from your own filter?

You've done the right thing in moving the corals. Run carbon, and start testing. Tell us:
temperature
salinity
alkalinity
calcium
phosphate if you have the test: that algae's coming from somewhere.

What kind of skimmer do you have and what return pump? It could be an oxygenation crisis.

Also what lights?

Is any guest in the house, a child, etc?

 

[neotekz]

your biological filtration is a little low, u might want to add some more live rocks, 50lbs in a 120g is not very much. i have close to 50lbs in my 35g. how many fish do u have? 50 is not bad if u don;t have too many fish