In article ,
Mr. Gardener wrote:
On Thu, 02 Mar 2006 21:03:58 GMT, Altum wrote:

robert.hhill wrote:
Does anybody know---will chemical filtering - i.e., activated charcoal -
remove Excel from the water?

Seachem says you can use activated carbon with Excel.

How's 'bout other plant fertilizers, iron, potassium, traces - do they
also escape adsorption by filter carbon?

Some poeple think iron is taken out. I dunno. Trying to keep a residual
0.1 ppm of iron is damn hard even without carbon. The rest are absolutley
unaffected.

The dula guys recommend carbon. Most everybody else says to avoid it. I've
never seen a difference either way.

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