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Old 06-24-2007, 04:36 PM   #1
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Cycling new tank - jumbo shrimp are now mostly gone

I added 6 jumbo shrimp to cycle my 180G - it's been about 3 weeks, and they're mostly gone now. Should I add more? Ammonia and 'trites are still too high to add fish (I'm doing 'fish-friendly' cycling this time).

Ammonia has been at 4.0 for the last few days, dropping a tiny bit (maybe) today. Nitrites are climbing - from 0.5 yesterday to the 2.0-5.0 range (in between those two) today. Haven't tested for trates yet, but I will tonight.

The tank definately SMELLS better now. It was pretty nasty after the first week.

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Old 06-24-2007, 06:13 PM   #2
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Add NO more let the cycle do its thing.. Sit back and watch the tank cycle, checking water parameters.
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Old 06-24-2007, 07:08 PM   #3
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I'm just concerned that once the ammonia is "used up", the nitrobacter (whatever?) wont' have anything more to feed on and it will weaken.
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180G All-glass with dual megaflows in a custom stand
AquaC EV-180 skimmer
250 pounds LR
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Custom acrylic sump from GlassCages.com
2xPCX-40 return pumps
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No-name 36W UV
Water General 125GPH RO/DI
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Old 06-24-2007, 09:35 PM   #4
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You need to let the cycle move on past the ammonia stage. You have nitrates climbing so that is good. Just sit back and wait at this point... NO water changes NO additives.. Just work on keeping Salinity stable and keep testing water. Adding more shrimp is just gonna drag things on at this point..
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Old 06-25-2007, 11:32 AM   #5
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It sounds like your cycle is doing it's thing. I would not add more shrimp or it will cause a new cycle and possibly kill off the nitrItes. You should see the ammonia drop to 0 and nitrItes spike and then the nitrAtes start raising along with the decline of nitrItes.
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Old 06-25-2007, 12:24 PM   #6
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As others have said already, you want to see you ammonia go up, then go to zero. The same with your nitrites. In a few weeks, you should have ZERO ammonia and ZERO nitrites, and a bunch of nitrates. Your bacteria will do just fine.

If once your cycle is completely finished, if you wait and don't add any fish for a week or two, THEN you'll need to add an ammonia source to keep your bacteria happy. A bit of food (flake, pellets, or frozen) is all you need. You don't need much.
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Old 06-25-2007, 12:57 PM   #7
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I agree also. Dont add any more shrimp and let the cycle do it`s thing. Once you are where the others said with no ammonia and nitrites and just nitrates then you can do a good size PWC and slowly add livestock.
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