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Old 02-11-2011, 10:59 AM   #1
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Mini Cycle

So, after i moved the tank this past Saturday my fish died. I've come to the conclusion that it was how they were acclimated to the tank. The corals and inverts all survived.

Since then, I tested and only found high nitrates - 80 PPM.

I added 3 medium shrimp into the 125 gal tank on Tuesday. Yesterday ammonia was .25 PPM. No nitrites.

Today, it's <.25 PPM. No Nitrites.

Do you think that was enough to mini-cycle the tank? I have probably 125# of LR in the DT and a couple pounds in the refugium.

I just want to make sure it's okay to start adding fish soon.

The plan is to do a PWC to get the nitrates down and then start stocking.
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Old 02-11-2011, 11:01 AM   #2
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i would not add anything until there was no detectable ammonia or nitrite.
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Old 02-11-2011, 11:07 AM   #3
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I agree. Let the system restabilize from the move before adding any new livestock.
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Old 02-11-2011, 11:13 AM   #4
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The main question is was that enough of a trigger to mini cycle?

There was die off on the rocks, I'm sure. But how do you think the bacteria fared during the move and cool water temp's?
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Old 02-11-2011, 11:17 AM   #5
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Moving can trigger a mini-cylce. And the shimp of course. You got time ti wait. Likely your ammonia will come down, but nitrites will go up and come down too. Like mentioned, wait until they're both zero.
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Old 02-11-2011, 11:26 AM   #6
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Do you think it's been long enough to see a nitrite spike? And do you think .25 PPM was enough?

The corals and coral banded shrimp and star fish are all fine throughout this. The shrimp even molted last night.
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Old 02-11-2011, 11:32 AM   #7
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It usually takes in the ball park of 7 days or so before you start seeing nitrites. .25PPM is plenty.
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Old 02-12-2011, 06:09 PM   #8
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Tested again, no nitrites. I am seeing some brown diatoms. I guess things are progressing.

Update. Tested for nitrates and they were 160! I did a pwc of 15 gallons and will retest.

Does this possibly indicate the tank has cycled? Nitrates were 80ppm before I added the shrimp. I was waiting on the cycle to do a pwc. Also, when should I turn the skimmer back on?
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Old 02-12-2011, 07:27 PM   #9
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i probably would get the trates down lower than that otherwise your looking at a fairly large PWC after your cycle is complete
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Old 02-12-2011, 09:43 PM   #10
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I did another 15 gal pwc.

What about the skimmer? When should I start it back up
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