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Old 07-05-2011, 12:32 AM   #1
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Having to do a fish-in cycle, need a little help..

Okay, so obviously I'm new to this if I was led into putting fish in before cycling by the evil LFS.. anyways, its about 3 weeks into a fish in cycle now (I don't wanna take the fish back to do a fishless cycle, so imma try my luck with this), and I have questions about my readings, pretty much is it right, where am I roughly in the cycle, and do I need to do anything different?

Also I plan to log my progress here, so if something goes wrong (or if something goes right even ) y'all could help me.

Just got back from vacation for 10 days, did a 50% pwc, heres my readings:

Ammo: ~0.25ppm
NitrIte: ~0.50ppm (first time I've seen NitrIte)
NitrAte: ~0.00ppm (maybe a tinie tiny bit darker than 0.00ppm but not near 5.00ppm)

What does the arrival of nitrIte mean?

Thanks!
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Old 07-05-2011, 12:38 AM   #2
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Here are some very helpful articles...

I just learned about cycling but I already have fish. What now?!

http://www.fishlore.com/NitrogenCycle.htm

The (almost) Complete Guide and FAQ to Fishless Cycling
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Old 07-05-2011, 12:38 AM   #3
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The arrival of nitrites mean you are half way there!

You have now enough bacteria that converts ammonia to nitrites, so ammonia should be near zero most time. The nitrites will spike as there is no nitrite eating bacteria yet. You need to continue with pwc to keep nitrite levels low and wait for the 2nd bacteria colony to develop. When that happens, the nitrates will start to rise & ammonia & nitrites will stay zero.

BTW - nitrites cross react in the nitrate test. So high nitrites will give a positive nitrate reading. Until the nitrites come down, don't get too excited with rising nitrates!
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Old 07-05-2011, 12:38 AM   #4
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Means you just need to continuecwith the PWC's. Nitrite means you have the BB that turns ammo into nitrite ... the next step is to have nitrates. At that point you have the BB needed to have a cycled tank.

Once you are fully cycled you should have 0 ammo, 0 nitrite and around 40ppm or lower nitrates. Above 40ppm nitrates is not ideal, I try to keep mine between 10 and 20ppm ... for my plants.
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Old 07-05-2011, 12:41 AM   #5
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Quote:
Originally Posted by jsoong
The arrival of nitrites mean you are half way there!

You have now enough bacteria that converts ammonia to nitrites, so ammonia should be near zero most time. The nitrites will spike as there is no nitrite eating bacteria yet. You need to continue with pwc to keep nitrite levels low and wait for the 2nd bacteria colony to develop. When that happens, the nitrates will start to rise & ammonia & nitrites will stay zero.

BTW - nitrites cross react in the nitrate test. So high nitrites will give a positive nitrate reading. Until the nitrites come down, don't get too excited with rising nitrates!
How often do I need to do pwc's then, I've just been doing them enough to keep my ammo below 0.25ppm.

Or I guess what do I need to base of off in which when to do a pwc?
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Old 07-05-2011, 12:44 AM   #6
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Quote:
Originally Posted by jcolon
Means you just need to continuecwith the PWC's. Nitrite means you have the BB that turns ammo into nitrite ... the next step is to have nitrates. At that point you have the BB needed to have a cycled tank.

Once you are fully cycled you should have 0 ammo, 0 nitrite and around 40ppm or lower nitrates. Above 40ppm nitrates is not ideal, I try to keep mine between 10 and 20ppm ... for my plants.
Okay, so I'm on track it sounds!! woohoo! Good news for me!
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Old 07-05-2011, 12:18 PM   #7
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Test this morning:

Ammo: 0.00ppm-0.25ppm
NitrIte: 1.00ppm
NitrAte: 0.00ppm-5.00ppm

Looks like both nitrIte and nitrAte went up.
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Old 07-05-2011, 12:23 PM   #8
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Time for a partial water change. Make it a good one too, those nitrites are way high.
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Old 07-05-2011, 12:25 PM   #9
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Quote:
Originally Posted by carey
Time for a partial water change. Make it a good one too, those nitrites are way high.
What do I wanna keep them under? So ill know how much to change.
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Old 07-05-2011, 12:34 PM   #10
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You want the trites at 0. I would do a 50% change now and maybe another later today.

Going the fish in cycle is a rough road. Good luck. if the ammonia or nitrite rise again, just keep doing PWC's til you get them back down. Eventually the nitrates will build up and will consume the nitrites.
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