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Re: CO2, Low Light, Rust
- To: aquatic-plants at actwin_com
- Subject: Re: CO2, Low Light, Rust
- From: Bill Wichers <billw at waveform_net>
- Date: Sat, 31 May 2003 14:43:28 -0400
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?
You need more light. The brownish "rust" mostly likely consists of diatoms,
which I've usually only found in tanks with too little light. Provided you
are also supplementing the usual nutrients, and are now adding CO2, you are
I have successfully modified eclipse hoods over 20 gallon tanks before to
use one of AH Supply's 55 watt PCF bulbs. It took some work but the results
were well worth it. Have a look at their offerings at
http://www.ahsupply.com. After you have upgraded your lighting to more
around the 2-3 watt/gallon range you should have much better luck with
plants in your tank, and less problems with algae.
(still battling the BBA in the 72 gallon as well)
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