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Re: [APD] Corkscrewing leaves - name the deficiency
Doesn't sound like you have too little Ca around. If it's
Ca deficiency, something is impeding uptake. The old Roger
post is interesting, yes. How about, if you have CaCO3
powder, you pack some into a ball and stuff it into the
substrate beneath some of the root tips -- maybe wrap in a
piece of newpaper first (or get some writing chalk). That
should settle the Ca issue.
--- Daniel Larsson <defdac at hotmail_com> wrote:
> Scott wrote:
> >If the Ca content is high enough, could it be that
> something else is interfering with CA uptake?
> Yes. I've stopped K2SO4 and MgSO3 and also
> gone down in KNO3 dosage.
> Total hardness 3.6 degrees.
> My dosage in my 300-litres-tank after each (big)
> wc is as follows:
> 30 ml Tropica Mastegrow
> (gives me 0,79 ppm K, 0,39 ppm Mg, 0,07 ppm Fe)
> 2 ml of my Mikro
> (gives me 0,13 ppm Fe)
> 1 tsp KNO3
> (gives me 7.22 ppm K and 11 ppm N)
> 20 ml KH2PO4 (2 tsp in 200 ml)
> (gives me 2.2 ppm PO4)
> So the K is probably lower than Ca. The Boron
> is high (Ca-deficiency is sometimes confused with
> Boron-deficiency). The Mg is low.
> This was interesting:
> It has gone through my mind to actually do some
> extreme vacuuming to be able to sort out the substrate.
> And I have actually put some chalkboard pieces in
> the substrate aproximately by this plant roots some
> months ago. Will check where they are.
> Another clue(?) is that nitrate-uptake seems really
> low despite DOC-free water and plenty of PO4.
> Daniel Larsson
> Aquatic-Plants mailing list
> Aquatic-Plants at actwin_com
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