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Old 09-09-2009, 08:55 PM   #1
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Problems

Over the past week or so, most of the fish in my tank have died. I have no idea why, since everything I know how to test for has been perfect for a couple of months, and I've done multiple readings recently.

Ammonia: 0
Nitrite: 0
Nitrate: 0
pH: 8.2-8.4
Alkalinity: 4.5 mEq/L
Specific Gravity 1.024-1.026

I have no idea what could be wrong. I called the LFS and they weren't any help. I plan to take a water sample up there to test, but I'm having car trouble and the earliest I can possibly make it up there is tomorrow night. If you want more details if you're trying to diagnose what's wrong, the link in my signature has all of that.

At this point, I'm just wondering what's best for the remaining fish. The only way I can get them into an established tank that I know is good would be to give them back to my LFS, which is a last resort. I've been seeding a small HOB filter for a little over a week now in my refugium, so it is possible for me to put all of my LR aside, and get all the fish into a 20G QT tank with that filter, but I don't know if that will even help. The fish left that have a real chance of making it are 7 damsels and 1 pseudochromis.

I have a feeling the answer is to give all livestock back to the LFS and start completely over from zero, but I want to know if there's any other option for my fish, my LR, or either of the filters I have set up at this point.

One more thing, I'm going to be on vacation starting this Saturday for a week, so anything drastic that I do has to be done before then.
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Old 09-09-2009, 09:39 PM   #2
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how long has the tank been running and wats the temp?
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special thanks to melosu58 , roka , thincat,CaptainAhab (and many more who i will list later as i find thier names so i can spell them lol ) for i would not have the tank or the knowledge i have about my tank if not for them.
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Old 09-09-2009, 09:40 PM   #3
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Started the tank at the beginning of July, so more than two months.

Temperature goes between 78 and 79.5 F
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Old 09-09-2009, 09:42 PM   #4
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when was the last fish added? it may have brought a disease into the tank if it was a recent add. as far as vaction do you have no one you can trust in your area to keep a eye on it?
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Old 09-09-2009, 09:46 PM   #5
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Last time anything was added was August 21. I added 50 lbs of cured LR on August 29, which was bought from marcorocks.com and cured in my garage. More measurements on that and details are in the link in my signature. The more recent stuff is at the top.
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Old 09-09-2009, 09:55 PM   #6
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did your fish start dying after the new rock was added on the 29th or how long after? did you notice any sudden change in water quality when you added?
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Old 09-09-2009, 09:57 PM   #7
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adding alot of lr at one time is not something good imo some would say otherwise but anything happining fast in a reef tank is not good even if its for the better you could have had alot of die off from the rocks when they went into the tank or either something could have been on the rocks when was the last death?
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Old 09-09-2009, 10:02 PM   #8
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Didn't notice any changes in water quality when I added anything, all of the levels for everything I can measure have been at zero for over a month.

First death was on September 1. It started one every couple of days, and just tonight I noticed three or four got a lot worse, a couple of them already dead when I got home from work.

There are no corals in the tank yet, I wanted to wait until the tank was a lot more stable to add them.

I cured the LR for 8 days in a trash can in my garage before adding it to the tank, and I took measurements every other day during the process (they're on the link also). I saw a spike in ammonia, and nitrite, and they went down to zero before I put the LR in the main tank. If there was die-off, then I would assume I'd see a spike in ammonia, right? I've tested everything twice in the past couple of days and ammonia has been low enough that I think it's zero. (the lowest reading I've ever seen on this test kit, even with new SW, was in between the color for 0.25 and 0, but not entirely yellow.)
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Old 09-09-2009, 10:07 PM   #9
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it sounds to me if you have never seen any type of amonia or nitrate spike in your tank you may have never finished your cycle are you sure it was cylced before you added fish? even a pros tank has a little nitrate most of the time? maybe others a little more knowledgeable will chime in......... thincat if your reading this wats your oppinion?
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Old 09-09-2009, 10:11 PM   #10
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well I asked here about that a while back. The consensus is that since I had so few fish in a 150G tank + 15G sump/refuge that I had a mini-cycle and should continue to add slowly so I wouldn't see a huge spike. It would make sense that 50 lbs of LR might have been too much to add, but if all of my fish are dying you'd think I'd see something measurable in my ammonia, right?
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