Ferrous sulphate - Miracle cure?

["Richard J. Sexton" <richard at aquaria_net>]

>Which single compound can reduce or eliminate the
>following problems, at the same time,  and without
>harming the fish or the plants?
> 
>1 "Brown algae" (Diatoms), Green water caused by
>excessive dissolved nutrients
>2 Turbid or discoloured water 
>3 Iron deficient substrate
>4 Excessive snail population

A diatom filter and a scouring pad.



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