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Re: Substrate dosing

I think the trick here is to place the 'missing' ingredient(s) in the
substrate. Since I have a relatively high fish load, I end up with a lot of
N and P in the water column. Makes no sense to dose those two into the water
column at all. Wouldn't keeping N and P out of the substrate make the plants
pull them from the water column? But what about K and Fe (and the associated
micros)? If the rooted plants are pulling N and P out of the water column,
why not place K and Fe in the substrate in order to facilitate the plants
and starve the algae? Isn't that the basic premise, are far as Fe goes, of
both laterite and Fluorite?