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Retread Rotala Question

Hey all.  I didn't get response the first time around
with this one, so I thought I'd give it another try.  
I have a question about Rotala here.  When I
first set my tank up as a planted aquarium, I had some
Rotala wallichi that grew like crazy.  It looked
plumish, full, and had bright pink growing tips. 
Every time I would trim it down, it would look worse. 
Now, it just looks ratty.  The nodes are spaced a bit
too much and the growing tip will just quit and a side
shoot will come up to the side, but they don't get
anywhere either.  I get the feeling this plant doesn't
like to be touched.  At all.  

I was reading a posting displayed on the Krib by Paul
Krombholtz (spelling?) in which he described the same
problem.  He said his recovered after the addition of
some lime, but after some additional calcium, mine has
not recovered.

I got some macrandra at an auction awhile ago that had
very red but very small leaves (not stunted though). 
In my tank, it looks better than ever, with much
larger leaves, but as it grows toward the surface, I
worry about the same trimming problems coming up with
this species too.  As it is now, about 4 stems out of
the 15 are growing absolutely puny stunted leaves
while the rest are fine.  Why only some stems?  

I had a problem with tiny leaves on my Bacopa
caroliana that was solved with the addition of
potassium gluconate.  At first, I thought it might be
calcium, but I guess it wasn't.  Potassium levels are
certainly high enough now, so why might some Rotala
leaves be so small?  My GH is about 90ppm and made
from distilled water reconstituted with RO Right, so
the calcium should be enough.  Right?  Flourish has no
boron, and I received a suggestion to try that for the
Bacopa, so I'm thinking of giving that a shot.  This
is a very frustrating problem.  
Can anybody help?  Thanks, Cavan.

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