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CO2, Low Light, Rust

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?

(still battling the BBA in the 72 gallon as well)

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