Cycling stalled - The Planted Tank Forum
 
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post #1 of 11 (permalink) Old 09-19-2019, 01:25 AM Thread Starter
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Cycling stalled

Hey everyone,

I am fishless cycling a tank, and everything was going well. Then out of nowhere, it stalled

The ammonia was going down to 0 within two days, but then it stopped going passed .5 ppm

My nitrates are really high, could that be the problem?
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post #2 of 11 (permalink) Old 09-19-2019, 01:27 AM
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Yes, super high NO3 will stop/stall nitrogen cycle.


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Growing is not that difficult.
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post #3 of 11 (permalink) Old 09-19-2019, 02:02 AM Thread Starter
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I did a PWC, like 20%. I’ll check the Parameters tomorrow.

Think that is enough?
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post #4 of 11 (permalink) Old 09-19-2019, 02:32 AM
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IMHO you want to keep the nitrates at around 40ppm or less . If you have 80ppm and you change half the water it brings it down to 40ppm . Go by that to judge how much water to change out .

My wife says if I get one more aquarium she is going to leave me . I sure am going to miss her fried chicken .
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post #5 of 11 (permalink) Old 09-19-2019, 02:37 AM Thread Starter
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Normally I keep the nitrates below 20ppm.

However since it’s fishless I don’t bother until the end.

But for whatever reason this time it got really high before it was done
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post #6 of 11 (permalink) Old 09-19-2019, 06:17 AM
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Quote:
Originally Posted by LuluCocoPopoRoro View Post
Normally I keep the nitrates below 20ppm.

However since it’s fishless I don’t bother until the end.

But for whatever reason this time it got really high before it was done
High nitrates can also cause algae problems, you really should not keep nitrates this high. I wonder why are your nitrates going up so high when you don't even have any live stock in it?

Anyways, if you are not sure if your tank is cycled I highly recommend you to get a bottle of Tetra SafeStar, it's only about 7$. Dump it all in the tank depending how big your tank is. After couple days test for Ammonia and Nitrite, you should see none. You can start slowly adding live stock to your tank. If you don't add fish your bacteria colony can slowly die because it feeds on Ammonia from fish waste.
post #7 of 11 (permalink) Old 09-19-2019, 09:44 AM
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I usually keep the nitrates below 20ppm.
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post #8 of 11 (permalink) Old 09-19-2019, 02:19 PM Thread Starter
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It’s a fishless cycle. I’m adding ammonia manually.
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post #9 of 11 (permalink) Old 09-19-2019, 02:35 PM
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I would say just wait it out. Mine seemed to have stalled for a while, then it was done, seemed like out of nowhere. Do you happen to dose Prime or Safe after you add ammonia? I believe it helps protect the growing Beneficial Bacteria from the higher levels of Ammonia, Nitrites and Nitrates.


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post #10 of 11 (permalink) Old 09-19-2019, 02:43 PM
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Can you provide the following:

- Temperature?
- KH?
- pH?
- Do you have good surface rippling?
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post #11 of 11 (permalink) Old 09-27-2019, 01:50 AM Thread Starter
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Did a 20% water change twice over two days.

Cycle picked started up again!

Must have been nitrates
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