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Re: [APD] co2 v. greenwater

I think it is unlikely that the Excel affected the growth of green water algae Excel's key constituents are products which algae aren't capable of using, only higher plants. Excel is said to be slightly antiobacterial in larger doses but that doesn't sound like it factored in to this situation.
Diff algae will grow under diff niche growing conditions. Change the conditions and one algae tends to fade and another will become more abundant. However, under good conditions for higher plants, the algae don't seem to get going very well at all. One must clean what appears, but the the algae production is very low under good plant conditions. Possbily, a temproary change in your tanke conditions spurred the green water alage -- this can happen with a sudden abundnance of some notrogen sources, like disturbing the subtrate or a fish dieing and rotting. In which case the green water might have subsided even if you did not add CO2. However, it is not unreasonable to believe that adding CO2 played a part in imporiving conditions for your plants and helping to rid the green water algae.
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----- Original Message ----
From: sia <siamensis at ftml_net>
To: aquatic-plants at actwin_com
Sent: Sunday, March 12, 2006 2:53:17 AM
Subject: [APD] co2 v. greenwater

I have a heavily planted 30-gal with about 70 watts over it that's been
running for a few years. This tank has always had a greenwater issue,
and I've kept a UV sterilizer on it until recently, when the bulb went
out and I was too cheap/lazy to buy a new one. Enter greenwater, which I
battled with frequent water changes and by pretending it wasn't there
(the Denial Method). Last week, I installed that $20 Nutrafin Natural
Plant CO2 system (I had been dosing with Flourish Excel with good
results). About three days after the thing finally started producing
CO2, the greenwater began to clear and is now completely gone, with no
water changes. I've only Excel-dosed once since installation.

It's possible that the Excel was causing the greenwater, but the tank
had GW before I started Excel and during weeks with no dosing at all
(vacation, forgot, etc.). 

Did the CO2 somehow clear the greenwater? If so, how? I think the two
events--GW death and yeast CO2--are too coincedental to be completely
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