CO2, Low Light, Rust

["Rachel Sandage" <rachelsor at hotmail_com>]

Hi all,

I recently started adding CO2 to my low light tank - it's a standard 29G 
with an Eclipse 2 hood, meaning 30W of plain-old florescent light. The tank 
is about 3 years old and was mostly algae-free - a little green spot here 
and there.

Since I've started to add CO2, all sorts of nasty algaes have shown up, 
including the dreaded BBA. But the worst is an algae that looks like rust, 
which has completely covered the older leaves of my bolbitis, and is growing 
well on anubias, apon. ulvaceous, willow hygro and Ludwigia repens. It seems 
to be leaving the sunset hygro alone for now.

What is it?

Thanks,
rachel
(still battling the BBA in the 72 gallon as well)

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