strange thing on rock and sand like dust

[waelaase]

dear all
i have something like dust (brown) on rocks and sand
it's not attached to them
cause when i make water current to them they disapper and flow on water
what is it?
and how to get ride of it?
thanx

 

[Brandon]

If you are getting some type of sediment (which I would assume is what is happening) on your rocks and sand I would try increasing the amount of water flow... ie..adding powerhead(s). This should keep things stirring until it can be filtered out.

 

[steve-s]

dear all
i have something like dust (brown) on rocks and sand
it's not attached to them

Sounds like a diatom or dinoflagelate bloom from a new tank. How old is the tank and what water was used as the souce in the initial "fill up"?

Cheers
Steve

 

[waelaase]

thanx

6 month
and ordinary water

 

[two11devan]

The tap water is most likely what is causing the algea bloom. Using RO/DI water for water changes will help keep the bloom under control and could take care of it totally. HTH!

 

[steve-s]

I agree with two11devan, tap water is often the cause of these kinds of algaes. Have you tested for phosphates and/or silicates?

Silicates are primarily the cause of brown algaes, diatoms and dinoflagelates.
Phosphates are typically the cause of green algaes. People using bottled spring water will have many problems in that regard.

Cheers
Steve