Re: [APD] Sudden Thread Algae Outbreak

[Vaughn Hopkins <hoppycalif at yahoo_com>]

Gordon, it looks to me like you are under fertilizing, and your CO2 
isn't high enough.  You didn't give us your KH reading, so the CO2 ppm 
isn't given.  You have a very high light tank, so you need to provide  
high nutrients too.  You need about 10-20 ppm nitrates, 1-2 ppm 
phosphates, 30+ppm CO2, traces, adequate calcium and magnesium, etc.  
So, what is your KH, GH and how do you inject the CO2?  (I'm not an 
expert at this, but I do have a 29 gallon tank too, and I slept at the 
Holiday Inn last night)(not really).

Vaughn H.

On Monday, December 26, 2005, at 07:44 AM, Gordon and Susan Watkins 
wrote:

> About 3 weeks after setting up my CO2 system, I've been attacked
> suddenly by thread algae which is growing as fast as I can remove it. 
> My
> tank is 29 gal. with a 10 gal sump, 130 watts of pc light, pH around 
> 7.1
> with CO2, nitrate = .5ppm, phosphate = 0, Flourish Nitrate and
> Phosphorus at 2 ml 2x/week, 25% water change every 10 days, light fish
> load, medium plant load. Some plants are growing well - red growth on
> Rotala indica and Hygrophila diffusum, good growth and pearling on
> Bacopa monieri, but weak C. wendti and H. corymbosum growth. Is it
> possible that I'm over fertilizing in spite of test results? Do I need
> something besides N and P? Any other ideas?
>
> Thanks,
>     Gordon Watkins
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