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Parts of Sand Bed Turning Black


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  • SRC Member

How deep is your sand bed?

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  • SRC Member

Hydrogen sulphide, not ammonia.

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read somewhere,if one use the plenum system.this black patches so called hydrogen sulphide would not appear,anybody with plenum system care to comment ;)

I use a plenum NNR, nitrates are undetectable and I don't have black patches in the sand.

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I use a plenum NNR, nitrates are undetectable and I don't have black patches in the sand.

how do i go abt solving the problem??

tank is abt 1 month old. just completed cycling

my dsb is abt 4 inches deep... ammonia and nitrite is undetectable using salifert test kit with nitrate at 1ppm..

salinity is abt 1.026

thanks

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unknown,

Don't worry. It's not a big problem as long as you don't disturb it.

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The black patches will come and go or expand or decrease in size.

Just don't disturb it as its part of the denitrification process.

The bubbles are also part of the nitrogen cycle... its the end result... nitrogen bubles. Congrats... your nitrates are being processed!

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unknown,

Don't worry. It's not a big problem as long as you don't disturb it.

thanks tanzy and at,

heh heh, a bit too late as i have siphon out the affected areas this afternoon causing nitrite level to shoot up again.. sigh, guess have to wait a while more for this unintended cycle to complete..

notice when i came back that parts of it turning grey again.. will leave it alone this time round...

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The black patches will come and go or expand or decrease in size.

Just don't disturb it as its part of the denitrification process.

The bubbles are also part of the nitrogen cycle... its the end result... nitrogen bubles. Congrats... your nitrates are being processed!

Hm... but where should the bubbles be forming at the top or bottom of the DSB?

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Hm... but where should the bubbles be forming at the top or bottom of the DSB?

It will form at the bottom where the anaerobic layer is and where the anaerobic bacteria will process nitrates as its food source and produce nitrogen bubbles that will slowly make its way upwards and out of the sandbed.

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