Stalled fishless cycle?

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Redpanda
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Stalled fishless cycle?

Post by Redpanda »

I’m trying to cycle little 25l tank for shrimps and making a pigs ear of it.
Basically it’s only got sponge filter and no flow. So I had everything covered in diatoms and grass was rotting. The other plant seems to grow but covered now in algae.
Anyway, nitrites and nitrates gone up, and stayed there for a few days, then dropped. Then I couldn’t resist but done water change just to get rid of some of the rotten stuff and some diatoms. Redosed ammonia. Since then ammonia is not dropping at 1ppm now been 48hrs, also tiny trace of nitrites, no nitrates.
I think I ruined it 🙈🙈
I’m in no rush at all. Shall I clean it properly and start again? Or wait until nitrites go up again?
Also got bladder snail in there, doing good cleaning. Would Nerite snails survive if I put them there to help with cleaning algae? Or are they more sensitive to ammonia and nitrites?

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Re: Stalled fishless cycle?

Post by MasonJ19 »

Quick question just because I'm interested, why didn't you cycle it by using some media from your other tank/tanks? I can't give an answer to your question though sorry I don't really know, I know bladder snails are pretty much indestructible so they won't care. But not sure on nerite snails.

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Re: Stalled fishless cycle?

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MasonJ19 wrote: Mon Mar 29, 2021 9:52 am Quick question just because I'm interested, why didn't you cycle it by using some media from your other tank/tanks? I can't give an answer to your question though sorry I don't really know, I know bladder snails are pretty much indestructible so they won't care. But not sure on nerite snails.
I only have sponge filter in the little one, so nowhere to add media from big filter 🙈 I squeezed sponge into water but not sure if that makes any difference.

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Re: Stalled fishless cycle?

Post by BigBen »

What is your ph? Stalled cycles are generally due to a pH crash. If it was me, I would keep on with the cycle.
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Re: Stalled fishless cycle?

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BigBen wrote: Mon Mar 29, 2021 13:02 pm What is your ph? Stalled cycles are generally due to a pH crash. If it was me, I would keep on with the cycle.
Just tested and pH is around 7, same as in big tank or tap water.

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Re: Stalled fishless cycle?

Post by VikingMummy2015 »

Redpanda wrote: Mon Mar 29, 2021 14:02 pm
BigBen wrote: Mon Mar 29, 2021 13:02 pm What is your ph? Stalled cycles are generally due to a pH crash. If it was me, I would keep on with the cycle.
Just tested and pH is around 7, same as in big tank or tap water.
But that’s after a water change so it could have crashed a few days ago, pre water change? When mine goes, it goes fast.
I definitely find smaller tanks harder to cycle and pH drops faster in them.
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Re: Stalled fishless cycle?

Post by Redpanda »

VikingMummy2015 wrote: Mon Mar 29, 2021 16:22 pm
Redpanda wrote: Mon Mar 29, 2021 14:02 pm
BigBen wrote: Mon Mar 29, 2021 13:02 pm What is your ph? Stalled cycles are generally due to a pH crash. If it was me, I would keep on with the cycle.
Just tested and pH is around 7, same as in big tank or tap water.
But that’s after a water change so it could have crashed a few days ago, pre water change? When mine goes, it goes fast.
I definitely find smaller tanks harder to cycle and pH drops faster in them.
It’s possible you know. Especially I have KH close to 0.
I’ll keep measuring ph as well 😊

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Re: Stalled fishless cycle?

Post by plankton »

What's the GH?
It may well be that with a low KH you need to add bicarbonate for the munchers to use during a cycle.

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Re: Stalled fishless cycle?

Post by Redpanda »

plankton wrote: Tue Mar 30, 2021 8:13 am What's the GH?
It may well be that with a low KH you need to add bicarbonate for the munchers to use during a cycle.
Sorry missed your post. GH is around 3-4 🙈🙈

So I’m not sure cycling worked. Now have ammonia going down in 2-3 days after every top up. Only trying to top up to max of 2ppm. Nitrites show up slightly on the day 2-3 then drop to zero when ammonia is cleared.
Does it mean that this is cycled?
Or should I start all over ?

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Re: Stalled fishless cycle?

Post by plankton »

I would do a water change, then top up to 2ppm ammonia and see what happens.
Keep your eye on the ph. ;)

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