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Re: Aquatic Plants Digest V4 #392

Is it possible to revitalize an older substrate by periodically adding
laterite fertilizer balls or Jobe's sticks to the substrate, instead of
using substrate heating cables?  In theory the addition of fertilizer to

the substrate should provide a new supply of nutrients to the substrate,

which as far as I understand is the end result of heating cables.
Of course this is in theory.