Re: [AGA Member] Soft water management (shift from newbie with some quesitons)

["S. Hieber" <shieber@yahoo.com>]

I guess that depends on who's doing the recommending.

I have much better results with a level closer to 0.6 to
1.0 ppm.  In fact, a good sign for me that PO4 is too low
is if BGA starts to show up.  Bringing the PO4 back into
balance with the NO3 knocks out the BGA quick.

I've been convinced that PO4, in and of itself, does not
cause algae problems in planted aquaria.  I'm not sure what
does, but the mere fact that PO4 is above 0.0 isn't it.

Of course, if the nitrogen or potassium levels or both are
real low, while PO4 is high, that seems to promote algae
while having the opposite effect on plants.  And in large
bodies of water, conditions characterized as high PO4 are
reportedly promoters of algae.  But I'm not sure what the
evidence is for PO4 causing algae in planted aquaria.  

Scott H.
--- Dennis Sheridan <dilvish@pacbell.net> wrote:
> From: "S. Hieber" <shieber@yahoo.com>
> 
> > ortho-phosphate tends to run low unless I add it.
> 
> Hi, Scott.  What are the recommended lvls for phosphate? 
> Isn't it
> something like .0x ppm? Surely you can get that from a
> couple of
> igneous rocks and leaving some leaves to decompose?
> 
> Regards,
> 
> Dennis
> 
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