Mr. Gardener wrote:

snip
well. I'm clumsily attempting Barr's concept of intentionally
overdosing and clearing out the excess with weekly water changes. I
don't have a lot of local resources for stuff like hydroponics - here
in Maine we grow our pot the old fashioned way, in well tended fields
and gardens, so not much call for hydroponics stuff.


http://www.gregwatson.com has all the stuff for Conlin-Sears or Barr EI
fertilization. IIRC, Conlin-Sears went with limiting phosphate. EI
limits nothing (maybe iron) but calls for biofiltration that removes all
the ammonia.

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