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Discussion Starter · #1 ·
I have had a problem with older leaves getting algae and/or falling off. Aside from telling me to increase co2, the other reason I've heard of this happening is possibly a deficiency in Ca or Mg. I was able to get the following readings from the water plant:

Average 38 mg/l Ca
12 mg/l Mg

Is this enough of these nutrients to prevent deficiency? The info I've seen only gives degrees hardness in GH.

(As an aside, I was suprised to learn the water averages 1.9 mg/l PO4!!!)
 

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Discussion Starter · #4 ·
Thanks, Kevin that's exactly the kind of conversion/calculation I was looking for. I'll double-check with a test tube measurement.
 
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