What can stop or restart a new tank cycling? - Tropical Fish Keeping - Aquarium fish care and resources
 
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post #1 of 10 Old 06-15-2011, 02:16 PM Thread Starter
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What can stop or restart a new tank cycling?

I recently COMPLETELY changed all of my substrate in my 46 gallon tank to make it better suited for future african cichlids and had to do a 100% water change as well. My tank will have been running for 2 months tomorrow. I am currently reading ammonia levels of .050ppm and no nitrites or nitrates and i haven't touched the water for almost two weeks. Could my substrate and 100% water change have completely restarted my tank cycling?
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post #2 of 10 Old 06-15-2011, 02:32 PM
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Alot of the beneficial bacteria will live in the substrate so it is quite possible, have you been running a filter with it too?
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post #3 of 10 Old 06-15-2011, 03:47 PM Thread Starter
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yes, a power filter with bio-wheel has been running on the tank since day one, plus a canister filter and a smaller power filter. All the extra filtration is due to recommendations from people who keep cichlids and said they get a little large and their high protein diet makes for alot of excess waste. but i think i did shoot myself in the foot when i changed the substrate out.
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post #4 of 10 Old 06-15-2011, 06:57 PM
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Agree with zof. I would monitor ammonia and nitrite very regularly (= daily). Ammonia at .05 is not an issue, but if it should rise to .25 I would do a water change and daily if it stays; same for nitrite. It is hard to say if the filter bacteria will be able to handle things; this would depend upon the tank volume, number and size of fish, filter state, etc. In basic water nitrifying bacteria can multiple within 9 (for nitrosomonas) to 20 (nitrospira) hours, and they do this by binary division (each bacterium divides into two bacteria) when ammonia or nitrite respectively is present.

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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 #5 of 10 Old 06-16-2011, 01:25 AM Thread Starter
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Yeah i most likely made my cycling process restart....or at least set it back for a while. Tomorrow my tank will have been running for 2 months. This entire time i haven't even seen Nitrates start to accumulate in the water. The ammonia is at .50ppm so i did a 25% water change and i do have two plants in the tank that seem to be doing well in the 8.2 ph water. Will continue to do daily 25% water changes until the ammonia lvls go down... any advice to help my tank finish cycling at last?
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post #6 of 10 Old 06-16-2011, 06:12 PM
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Quote:
Originally Posted by Jadgpanther4tw View Post
Yeah i most likely made my cycling process restart....or at least set it back for a while. Tomorrow my tank will have been running for 2 months. This entire time i haven't even seen Nitrates start to accumulate in the water. The ammonia is at .50ppm so i did a 25% water change and i do have two plants in the tank that seem to be doing well in the 8.2 ph water. Will continue to do daily 25% water changes until the ammonia lvls go down... any advice to help my tank finish cycling at last?
The plants should help, especially if they are fast growing types, as they assimilate a fair bit of ammonia/ammonium. If plants have been i the tank from the begining, that may explain why nitrates have been zero. A water conditioner that detoxifies ammonia would be good too, some but not all will, it will say on the label if it does.

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 #7 of 10 Old 06-16-2011, 09:41 PM Thread Starter
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YEah my bottle of water conditioner says it detoxes ammonia. it is still present in the tank but now is close to .25ppm levels. I am continueing the daily water changes. I just wish my tank would finally be established so i can move on to the real fish that i want. I tried putting very small baby cichlids in the tank when i first got it and they all died within days. Now its just the 6 black finned tetras. So i should just keep doing 25% water changes every day until the ammonia finally reads zero?

Last edited by Jadgpanther4tw; 06-16-2011 at 09:49 PM.
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post #8 of 10 Old 06-17-2011, 01:29 PM Thread Starter
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Crazyness just happened today. Tested the ammonia in my tank and it reads zero! I then tested the Nitrites and it was barely reading at 0.25ppm. COULD IT BE?! After two long months my tank is finally starting to cycle!
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post #9 of 10 Old 06-17-2011, 02:24 PM
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Ammonia detoxifiers work by changing ammonia to harmless ammonium. This does not affect the bacteria/cycling, nor live plants assimilation of ammonium/ammonia, but it does mean the fish are not being harmed. And test kits will read ammonia/ammonium as "ammonia."

Now that nitrite is appearing, daily water changes to keep it below .25 must continue. Some water conditioners also detoxify nitrite, Prime and Ultimate do, there are a coule others I can't remember. They work for about 24 hours, so daily monitoring/water changes etc.

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 #10 of 10 Old 06-18-2011, 01:12 AM Thread Starter
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Thank you very much for all your continued help. I just can't believe it has taken two months for this stuff to get underway! geez! lol
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