Hi All,
Have not been around for a while but have had a major problem with the tank and need some advise!
A few weeks ago i noticed that my nitrates had suddenly risen from below 12.5mg to over 50mg i have no explanation for the sudden rise as the tank is not overstocked and nothing was dead plus i have over 90Kg of live rock?
If you are doing regular tank maintanance and this happened suddenly it is likely something died - a large water change should have sorted it out
anyway fearing for the inhabitants i took all the live rock out of the tank and revealed a hell of alot of dead bristle worms under the rack so i quickly syphoned all the crap out and began some big water changes (50%) which i did three times.
Do you have good flow under the rack?
I have now returned nitrates to 5mg with ammonia and nitrite at 0. I just dont understand why all these worms were dead and the corals/fish were fine?
Maybe the worms died of something else, not the nitrates
I put all the rock back into the tank after around 30 minutes of cleaning and did the water changes with some reef safe nitrate remover as recommended by my LFS.
Because you took the rock out for thirty minutes you have probably had a mini cycle. Don't use nitratte remover, sort the problem out
All levels were normal but all the coral went downhill and more or less disintergrated within days? i managed to save my anemones and mushroom corals and put them in another tank but over the next week every fish apart from my boxfish died with good water quality?
I suspect you had a mini cycle
I really can't understand the problem as i have left it a few weeks then added a couple of fish which are doing great, but every coral i have tried to add takes a turn for the worse within a couple of days, i now have a major outbreak of bubble algae and do not know where to start with getting it under control apart from removing the effected rocks and jet washing them
Ok, lets just take a deep breath and start sorting the problems out - as you have few corals and fish I think i would move them to a holding tank - a plastic box will do with a heater and a powerhead piece by piece take the rock out and scrape off the bubble algae being careful not to burst the bubbles, then place the rock back (after doing each one) - this will take some time so it is good to have someone help you for the company and to help keep an eye out for every bit of bubble algae.
You mentioned the corals not thriving - what lighting have you got, have you changed it recently? You said you have a lot of bubble algae, it might be that your phosphate level is high which is feeding your bubble algae
so lets get rid of the algae then you can test again, in particular for phosphate - think of this as being a weeks job, not just a couple of day
The only change to the tank was new bulbs and relectors a week before all this started, has anyone got any ideas of shall i taken everything out and but new live rock and more or less start again?
Changing the lights suddenly, particularly if the old bulbs were 'too old' can cause problems for corals