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Sand in sump

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#1 Guest_Ben Bonell_*

Guest_Ben Bonell_*
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Posted 03 March 2012 - 11:41 AM

the sand in my sump has started to turn black, is this normal or should i think about getting it out? Ive never experienced this before, should i be worried?


#2 Guest_dave14_*

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Posted 03 March 2012 - 02:58 PM

Hmmm not sure, but black doesn't sound good to me

#3 Blacktip


    Trigger Fish

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Posted 03 March 2012 - 03:16 PM

The black stuff is where the sand has turned anoxic. Its not good but as long as it is only a bit it wont cause any problems. I take it it is a DSB? I've run DSB's for years and never got them to run well long term. I think they need to be turned over A LOT by critters to work properly.... and we rarely run them with enough critters.

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