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 Cycling/water condition abnormality

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ddavis1979
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PostSubject: Cycling/water condition abnormality   Mon Jan 28, 2013 8:28 am

So I started a 20 Gallon long fish tank back on January 8th, almost 3 weeks ago.

I started off with a fish-in cycle, and I had 2 corydoras in there on day 1. And about a week later, I added 5 Pristella Tetras and a Betta.

I tested my water this morning and much to my surprise (ammo-0/nitrite-0/nitrate-0)

How after 3 weeks can all 3 readings be zero?

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Liz
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PostSubject: Re: Cycling/water condition abnormality   Mon Jan 28, 2013 9:58 am

You ought to have some nitrate if the cycle is done, so you're not there, but you also don't have any of the ammonia and nitrite we'd expect to see, so you're cycling "silently," as they say.

Did you have any seed material (filter or floss from established tank, gravel, decor from established tank) that you used to set up the tank?

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PostSubject: Re: Cycling/water condition abnormality   Mon Jan 28, 2013 1:10 pm

When I purchaased the tank, it was an established tank and had a sack of Fluval Biomax media in the aquaclear filter.

I put that filter on the back of my 55 to preserve the BB in the media. Then I transferred it to the new tank when it was set up and ready. I also took 6 -8 of those same biomax ceramic rings from the internal filter I had running on the home tank and wedged them on the back side of the filter floss in the new filter.

I have no idea if any of that was effective Smile

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PostSubject: Re: Cycling/water condition abnormality   Mon Jan 28, 2013 1:20 pm

That explains it, and yes, they were effective!

I'd watch the fish and keep checking the levels of ammonia/nitrite/nitrate, and I'm thinking you'll just suddenly see some low nitrate levels start to appear. Often when you seed a tank like this you skip over the worst part (ammonia and nitrite) and sail right into being fully cycled, and that's why they call it a silent cycle.

I would definitely not add any fish, and don't disturb the filter, decor or substrate during this time until you've got some nitrate showing and the other two still at zero. The bacterial colonies are vulnerable right now so just do simple small PWCs without vac'ing the gravel or cleaning the filter.

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PostSubject: Re: Cycling/water condition abnormality   Mon Jan 28, 2013 1:31 pm

How long do you think it will take. I was fully expecting to see something before 3 weeks?

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PostSubject: Re: Cycling/water condition abnormality   Mon Jan 28, 2013 1:56 pm

I have had these things poke along for 6 weeks. If the fish seem fine then no worries!

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PostSubject: Re: Cycling/water condition abnormality   Mon Jan 28, 2013 4:47 pm

You didn't mention plants, but if you have enough and they're growing, they may be removing all the NH3/NO2/NO3 down to levels you can't measure. 2 cories, 5 pristellas and 1 betta is a pretty light fish load in 20 gallons, and it wouldn't take too much plant biomass to absorb all their nitrogen waste.
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PostSubject: Re: Cycling/water condition abnormality   Mon Jan 28, 2013 7:41 pm

There are very few plants....1 anubias, and two small 3"x1" patches of micro sword.

I will give it another week and then add some more fish.

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20 Gallon Long Freshwater Community Tank (semi-planted) 30"x12"x13"


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PostSubject: Re: Cycling/water condition abnormality   Mon Jan 28, 2013 8:01 pm

@ddavis1979 wrote:


I will give it another week and then add some more fish.

I would suggest that you NOT add any fish until you're measuring some nitrate and zero for the other two. JMO! Very Happy

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PostSubject: Re: Cycling/water condition abnormality   Mon Jan 28, 2013 11:11 pm

Noted Smile

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