Re: [APD] Re: Nutrient Dosing

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

>You don't need to add either Calcium or Magnesium nor adjst the Alkalinity 
>given those readings. You do know that the reported results as CaCO3 doesn't 
>necessarily mean that CaCO3 is the sole diatomic cation responsible for the 
>water's hardness. Any +2 cation will contribute to water hardness, but Ca+2 
>and Mg+2 are the most common. The readings are reported as ppm (mg/l) CaCO3 
>purely as convention.

Gah. 

Is it jsut me or does hornwort seem to be an indicator plant for
low levels of carbonate and magensium. It's never done well for me
in soft water tanks and if I see it sart to grow pale and weak it
indicates it's used up most of the minerals.

Or am I just imagiing it?


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