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Re: [none]

> Date: Mon, 20 Jul 1998 23:13:34 -0700
> From: Marie-Andree Lemieux <webdsign at malem_com>
> My plants have yellowish leaves, I suspect iron or magnesium defiency
> (first Iron)
> I would like to know what would be a good cost effective way to fertilize
> my plants.
> I also just bought a Plant Prod chelated Iron (7% iron and 48.8% DTPA. Is
> that good? any dosage propositions, how should complement it?....

I use this stuff occasionally.  I add a very small pinch every few months
if my plants look a bit yellower than I like.  At this rate, the 250g jar
will last several lifetimes...

For magnesium, buy some epsom salts (sel d'epsom) at a drugstore.  A 2kg 
bag only costs about $3.  People use it to add to bath water. This will 
also last a lifetime.  Try adding a teaspoon of it to your next water 
change to decide if it makes any difference.  Epsom salts are non-toxic,
but they do harden the water.  I add about 2 tablespoons to 10 gallons
for my rift lake fish.

I suggest you phone your water department and ask them for an analysis
report.  This will give you some idea of the level of various elements
in your tap water.  Unless you have very soft, very pure water, few or
no fish, and are really pushing growth with intense light, you may not
need to add other trace elements.

> so many questions...
> thank you in advance veterans

I should warn you that although I've had planted tanks on and off for
decades, I'm a low-tech type, and cheap as well!