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[APD] RE: K+ and Ca++
>>Then is possible high K blocks Ca?
> Same as high K+ blocks Ca++.
> Or high K+ blocks Boron.
> Or, or or.
> So why don't we see that also?
> I have had very high Ca but no K+ issues.
Well. I understood, on your earliers postings, your explanations wero on
the way to say it was scientifically imposible K blocks Ca, I,m not
asevering nothing ;-)
> >>Using more NO3 vs NH4 also helps decrease any higher K+ effect.
> >> High temps also were cited for increases in Ca+ blockage.
> >I use very ofen NH4 (I know what are you thinking, but I havent algae
> Back off the NH4 and switch to NO3 and note any effect.
Next time I will try to stop fertilizing NH4, and with few friends will try
one adding Ca an others with B. I know it will not be an experiment but
shold be ilustrative
> >But Mg deficiency is more or les simimlar to Fe deficiency (yelowing
> Have you seen Mg deficency in aquatic plants in person?
Not at all
> There is paleness, some "veining" in some species such as Anubias, some
> > Also, what is the soruce of K+ that folks are using here? KCL or K2SO4?
> I my case nitrate and sulfate necver cloride
> Same here.
> Had nice hard water like yours, no issues, I used the same stuff.
> >Myself sugested some possible relation with B but there are some
> >suporting high K blocks B?
Ok another open door
> >I thing you have opened a lot of possible explanations, and maybe several
> >them work togheter. And Maybe the imbalances K wit Ca or wathever, should
> >the explanation the more apropiate
> >Antonio Trías
> Well, I'm saying that high K+ does not effect, at least 30-40ppm perhaps
> 50ppm ranges Ca++ uptake.
> I know what is NOT happening, but I'm not sure about what IS going on here
> with some of these plants folks are talking about.
> I'd add more traces, add NO3, reduce the lighting if someone is having
> issues. Less K+ is fine, but the causes for your and a few others(about
> of you are the only ones that have seemed to have had this issue from the
> looks of it), is very debateable.
>4-6 folks out of thousands is not a "trend" but worth looking into.
I can tell you several more on my country ;-)
> not seen it ever and cannot reproduce it.
> Some of you have argued like everyone has this problem but I've counted
> people, it's only a few of you that have said anything.
> There may be more, but I have not heard from them.
> Many folks in Asia dose higher K+(20-30ppm) and have low Ca also do not
> report these problems with the 3 species of plants that folks here have
> complained about stunted tips. Eusteralis, Nesaea, Ammannia.
> I do not think it has anything to do with K+ and Ca unless folks are way
> over the K+ levels even if YOUR solution to remedy the problem is
> in K.
I,m not trying to say tha is an UNIVERSALLY solution
> I don't see it. I can do what the folks have said with the same
> plants(Right now with Ammannia) and I'm not seeing this occur. I'm leaving
> the Ca alone, keeping it low just prove the point.
> Maybe I have magic water:-)
Do you believe on magics ;-) Tom?
> I'll talk about the growth of Ammannia gracilius in about 1.5 weeks. with
> high K+(+30ppm).
> Tom Barr
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