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Re: Aquatic Plants Digest V3 #1064

> This is very misleading! Calcium _deficiency_ shows as deformed growth
> but a calcium shortage will be evident as slow growth rates for many
> plants especially Echinodorus species. I believe that there is a range
> of symptoms of calcium shortage which become more extreme as the calcium
> concentration goes lower.

> > > What is the best way to add calcium ?
> >
> > Lime adds calcium, but it also will drive your pH high ...
> >
> > You might be better off using calcium chloride (sold as deicer) and
> > calcium carbonate (oyster shell).
Read that egg shell can be used for calcium. How to add and how much to
be added? Do we need to cook the egg shell 1st?