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fairview
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Hello,

I have set up a Deep Sand Bed of about five inches. last night when I was fixing thing sup, I moved a little bit of sand and the underneath sand was blue/black. I heard this was not good and could be fatal for the living on the tank.

What can I do? It would be almost impossible to remove the sand bed.
 

reefer4eva

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Location
Glendale,Queens.
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What's size tank is it?how many fish and inverts are in it?any pics of the tank?how many pounds of live rock are in the tank?how long has it been setup?sorry for all the questions...I can have answers for you once these questions are answered
 

reefer4eva

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Location
Glendale,Queens.
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Any pics of the black spot?what kind of maintainence do you do on the sand bed?what size tank?how are the water paremeters?my honest opinion i think 5 inches is too much...4 inches is probably the max i would ever go.also what kind of sand are you using?most of the time cynobacteria develop in the lowest oxygen level along the glass only cause of the light traveling thru the glass.atleast once a month run the rubber end of a fishnet along the glass to free up the algae which won't do any harm once it is exposed to a richer oxygen water column.as far as the black stuff if it smells like rotten eggs it is Hydrogen sulfide.Hydrogen sulfide often results from the bacterial breakdown of organic matter in the absence of oxygen.in other words the bacteria needed to keep the deep sand bed alive is dying off and with the lack of oxygen due to the sand bed being deep.PLEASE post a pic so it can be confirmed as hydrogen sulfide is a poisonous gas which is heavier than air and can be harmful to you as we'll as the tanks inhabitats
 
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