when to remove shrimp in a fishless cycle? - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 25 Old 03-14-2012, 12:25 AM Thread Starter
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when to remove shrimp in a fishless cycle?

I'm new to this forum so hopefully this is the right page to ask questions if anyone has an answer!

I have a new 3 and a half foot fish tank (153 litres) and I'm currently doing a fishless cycle. It's in the second week. I have some frozen shrimp in a pantyhose and the ammonia jumped to about 6 ppm over about 10 days. A few days ago the Nitrite jumped to 0.50 ppm and today I tested for nitrates and it's around 20 ppm.

As I see nitrites and nitrates raising the ammonia isn't dropping. My question is when should I remove the decomposing shrimp? Does it all seem to be on track in the cycling process? It's the first time I've tried a fishless cycle and hope it's on track.

Thanks
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post #2 of 25 Old 03-14-2012, 08:42 PM
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Welcome to Tropical Fish Keeping forum.

I've never gone the shrimp cycling route (I use live plants, another story), but other members have so I'm sure some of them will be along to comment. In the interim, have a read of this guide to cycling written by one of our members and stickied at the head of this section, but here's the direct link:
http://www.tropicalfishkeeping.com/f...m-cycle-38617/
This method is included.

Byron.

Byron Hosking, BMus, MA
Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
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post #3 of 25 Old 03-14-2012, 08:46 PM
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Quote:
Originally Posted by Liepold View Post
I'm new to this forum so hopefully this is the right page to ask questions if anyone has an answer!

I have a new 3 and a half foot fish tank (153 litres) and I'm currently doing a fishless cycle. It's in the second week. I have some frozen shrimp in a pantyhose and the ammonia jumped to about 6 ppm over about 10 days. A few days ago the Nitrite jumped to 0.50 ppm and today I tested for nitrates and it's around 20 ppm.

As I see nitrites and nitrates raising the ammonia isn't dropping. My question is when should I remove the decomposing shrimp? Does it all seem to be on track in the cycling process? It's the first time I've tried a fishless cycle and hope it's on track.

Thanks

I did the exact same thing, and was told here, that once I started getting the ammonia reading, I could remove the shrimp. There is enough ammonia to get the cycle started, you don't need to leave it in any longer - it gets pretty gross Good way to cycle!

Gwen

Just because animals can't talk, does not mean they should not be heard
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post #4 of 25 Old 03-15-2012, 02:00 AM Thread Starter
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Quote:
Originally Posted by Byron View Post
Welcome to Tropical Fish Keeping forum.

I've never gone the shrimp cycling route (I use live plants, another story), but other members have so I'm sure some of them will be along to comment. In the interim, have a read of this guide to cycling written by one of our members and stickied at the head of this section, but here's the direct link:
http://www.tropicalfishkeeping.com/f...m-cycle-38617/
This method is included.

Byron.

Thanks Byron! The article was very helpful - thanks for the link!
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post #5 of 25 Old 03-15-2012, 02:07 AM Thread Starter
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fishless cycle

Thanks Gwen! Glad to know you have sucessfully done the same fishless cycle! I took the shrimp out today. Now that the Nitrite is 5.0 ppm and the nitrate is about 50 ppm, does the nitrate need to get any higher before it starts decreasing?

Do I need to keep adding ammonia?

Thanks,

Tonja
(liepold is my fish)

Last edited by Liepold; 03-15-2012 at 02:10 AM. Reason: spelling error
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post #6 of 25 Old 03-15-2012, 02:09 AM Thread Starter
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Sorry Nitrite is 5.0 ppm
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post #7 of 25 Old 03-15-2012, 03:50 AM
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NitrAte will not generally decrease on it's own. Thats when you gotta do a water change.

Seems your tank is well on it's way through the cycle. I dont think you need to add any more ammonia source. Just do water changes to keep the nitrAtes down below 20 and then when ammonia and nitrItes are 0 you can start adding in fish.. I would recommend adding slowly.
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post #8 of 25 Old 03-15-2012, 07:21 AM Thread Starter
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NitrAte will not generally decrease on it's own. Thats when you gotta do a water change.

Seems your tank is well on it's way through the cycle. I dont think you need to add any more ammonia source. Just do water changes to keep the nitrAtes down below 20 and then when ammonia and nitrItes are 0 you can start adding in fish.. I would recommend adding slowly.
Thanks Ladayen,

Good to know I'm on the right track!

Do I need to wait until the ammonia and nitrities go to 0 on their own before doing a water change to decrease the nitrAte?

Tonja
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post #9 of 25 Old 03-15-2012, 09:29 AM
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Quote:
Originally Posted by Liepold View Post
Thanks Gwen! Glad to know you have sucessfully done the same fishless cycle! I took the shrimp out today. Now that the Nitrite is 5.0 ppm and the nitrate is about 50 ppm, does the nitrate need to get any higher before it starts decreasing?

Do I need to keep adding ammonia?

Thanks,

Tonja
(liepold is my fish)
Bryon may know more about this. Once you start getting nitrates, the cycling process is usually finished, but because you have nitrites, which are really deadly to fish, I suggest patience at this point. Eventually, the nullifying bacteria will get in big enough numbers to handle converting your high nitrites over to nitrates (which are safer in low numbers). You probably can do a water change to begin lowing some of those numbers. Let's see what Bryon says on this one
When did you start this process, by the way?

Just saw the other posts too. Good info there. No, don't add more ammonia.

Gwen

Just because animals can't talk, does not mean they should not be heard

Last edited by GwenInNM; 03-15-2012 at 09:31 AM.
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post #10 of 25 Old 03-15-2012, 09:58 AM Thread Starter
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Bryon may know more about this. Once you start getting nitrates, the cycling process is usually finished, but because you have nitrites, which are really deadly to fish, I suggest patience at this point. Eventually, the nullifying bacteria will get in big enough numbers to handle converting your high nitrites over to nitrates (which are safer in low numbers). You probably can do a water change to begin lowing some of those numbers. Let's see what Bryon says on this one
When did you start this process, by the way?

Just saw the other posts too. Good info there. No, don't add more ammonia.

Gwen


It would be good if I could start doing water changes! I started the process 12 days ago. Ammonia took over a week to jump really high. Nitrites were on 0 until the 8th day and have been increasing steadily since then. A few days ago nitrates started showing and is around 50 ppm at the moment.

Thanks for the info! Yes I appreciate all of the helpful answers and info! It's been a bit confusing until I heard back from people!

Tonja
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