what is chaeto

[jakob1977]

what is chaeto

[Michael L.]

It's a common algae used for nutrient export in aquariums.

[pjf]

There is a picture of a handful of chaetomorpha in this article: http://www.advancedaquarist.com/2005/3/lines

It looks like a green "Brillo Pad." It does not have holdfasts, is not invasive, and does not need substrate or rock to cling to. Since it can act as a mechnical filter in circulating water, I rinse the chaetomorpha whenever I perform a water change.

I would only order it from a local fish store. Every time that I have placed a web-order for macroalgae, it arrived with a pest, such as aiptasia anemones or caulerpa.

[drummereef]

And more pics here.
http://www.liveaquaria.com/product/prod_display.cfm?pcatid=2401