Help to ID

[jvega888]

Hi,

Please help to ID the reddish brown stuff on my sand and rocks.

Are these coralline algae?

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[JMW]

Looks like diatoms to me. Give your sand a stir, you will notice the drown stuff dissipates. Coralline does not do that, it's calcareous & it doesn't grow on the sandbed 

[Harry H]

Sir it could by cyano bacteria if your tank is fully cycled. It might get worse and become red algae but it is not algae, it is a bacteria. Read up on it. Solution: chemi clean.


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[kapemasarap]

If u can afford to setup a small holding tank, move livestock to safety and nuke the hell out of it with chemiclean


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