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Re: Aquatic Plants Digest V1 #242
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To: Aquatic-Plants at actwin_com
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Subject: Re: Aquatic Plants Digest V1 #242
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From: stevensj at calshp_cals.wisc.edu
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Date: Mon, 14 Aug 95 11:36:42 CDT
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In-Reply-To: <199508140739.DAA24065 at looney_actwin.com>; from "Aquatic-Plants-Owner at actwin_com" at Aug 14, 95 3:39 am
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Mailer: Elm [revision: 70.85.2.1]
<snip>
> Well after 24 hours of CO2 from a bottle of yeast ph has dropped to a more
> reasonable 6.8 just before the lights went on for for the day. However my
> yellow and brown spots are still growing bigger.
>
> Should I increase the hardness to say 80 or 100 ppm? Note 55 ppm relates
> to about 3.3 grams per gallon or a bit less. And if so how much baking
> soda should I use for this?
>
> Dennis
>
Dennis,
I doubt that your brown spots on your amazon swords are due to CO2 deficiency.
I'd say it's more likely lighting or nutrient deficiency. I'm pretty sure
this is a symptom of potassium or magnesium or nitrogen deficiency. Do you
use any fertilizer & what are your nitrate levels?
Joanne.