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More Stargrass Stuff / Nitrogen Feeding A Waste?

My thanks to those of you who commented on my
stargrass suffering under my Zoomeds.  I wanted to
comment some more on the problem.  I'll first give a
run down of my feeding regimen.  I give my tank .5ml
of Flourish, .5ml of Flourish Potassium, .25 of
Flourish Iron every day, and a trace amount of boric
acid twice a week.  I was giving kno3, but I have less
green spot without it.  (Almost no other algae at all;
you really have to look hard).  

That's the same as before the decline.  I wonder if
all the new Caridina japonica (I found 2 females with
eggs the other day!) grasping it have anything to do
with it.  Damage?  This plant is rather sensitive like
that.  The section that's the worst has a Jobes stick
under it.  Coincidence?  I'm really grasping at straws
here.  I'm assuming all the bases are covered when it
comes to nutrients, as the other plants are doing
well.  Even the Lilaeopsis has speeded up.  
There's not really anything different now than then
except for the kno3, which I'm thinking might be
unnecesary because...  

I found an old FAMA with an article by Diana Walstad
that says aquatic plants prefer to use ammonia rather
than nitrate.  This concurs with everything else I
have heard.  If that's true, why are we putting in
kno3 and Jobes sticks?  Couldn't we just put in more
fish food for the ammonia (assuming we put in K from
another source like potassium sulfate)?  The article
also said that aquatic plants bring the ammonia
through their leaves.  Why the jobes spikes then?  How
do they bring the potassium in?  Through the roots? 
The phosphates?  

Thanks, Cavan     in Pittsburgh  

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