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Old 01-23-2014, 05:04 PM   #1
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What is this?

just wandering whats that on my sand and if thats normal?
tank is 2 months old

and is it normal to have a dirty skimmer like that within 24 hours of cleaning the cup?


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Old 01-23-2014, 05:10 PM   #2
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That is cyanobacteria in the sandbed. Typical to see in tanks fresh out of cycle, but it is an indicator of excess nutrients in the water column.
Use ro/di water in top offs and water changes, feed minimally like 2-3 times a week, and siphon the cyano out during water changes. It can take some time to get rid of...they make products that will make it vanish, but doesn't resolve the issue that causes it. It will then return without addressing the underlying issue. That and adding chemicals to your tank should be a last ditch effort.

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Old 01-23-2014, 05:17 PM   #3
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We have a good article about it in our sw articles section.
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