[APD] Re: Nutrient

["William M. Cwirla" <wcwirla at verizon_net>]

Regarding my lame looking H. difformis:

I'm using the chelated iron and trace elements from Homegrown 
Hydroponics.  I mix 2 Tbs into 300 ml (Man, I'd give anything for one 
of those nifty electronic pan scales we used to use in the laboratory!  
Should've grabbed a used one off the scrap heap on my way out of 
chemistry.)  That's why I was asking about the magnesium.  In the old 
PMDD recipe, there was a whopping dose of epsom salts.

The H. difformis in question is in a 10 gallon tank with 45 watts of 
ordinary fluorescent lighting (probably less since I use old bulbs in 
this tank); DIY CO2 at approximately 20 ppm CO2 based on kH and pH.  
Since adding nutrient separately with water testing, the new growth 
seems to be coming back normal looking.  Someone mentioned that H. 
difformis is a great "canary" for nutrient deficiency early warning.  I 
was just wondering.  If anything, potassium was low initially.  Should 
be 15 to 20 ppm now, but I'm guessing.

WMC

On Dec 21, 2004, at 9:03 AM, aquatic-plants-request at actwin_com wrote:

> Try cranking up the Fe levels. Are you using a balanced micronutrient 
> mix or
> dosing iron by itself?
>
> "My h. difformis started doing better when I cut back on K2SO4, but 
> I'm not
> sure of a connection."
>
> I doubt that K2SO4 was a problem. Potassium is relatively benign as is 
> SO4.
> Both Potassium and Sulphur are macronutrients and they don't usually 
> cause
> much of a problem if present slightly in excess of the plant's needs.
>
> How is your lighting and CO2 levels?

_______________________________________________
Aquatic-Plants mailing list
Aquatic-Plants at actwin_com
http://www.actwin.com/mailman/listinfo/aquatic-plants