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Which is the right PMDD recipe ?
I use the first recipe with good results. I get good to spectacular growth
with a simple gravel substrate. Of course none of my plants require brain
surgery, mostly swords (including a spectacular "Red Melon") several
different apons, water sprite, ludwigia, green crypt, a couple of anubias,
and some val all in a 55 gal. I dose at 3 ml a day, I use a length of 3/8"
rigid and a doggie medicine doser to inject the mixture directly at the
roots of the rooted plants about once a month. I've had a few bouts of minor
green spot, and some very minor hair algae outbreaks but nothing serious.
The ottos and the SAE keep everything well in control. Hope this helps.
Charles aka
"SnakeBit"
>
> Date: Sun, 17 Dec 2000 06:19:45 -0800 (PST)
> From: Dennis Chua <dennis_chua at excite_com>
> Subject: Which is the right PMDD recipe ?
>
> In the Krib site APD archive I found two version of PMDD recipe :
> - --------
> (Original Sears & Conlin paper)
> Control of Algae in Planted Aquaria
> March 1996
> Appendix A :
> 1 Tbsp (~9g) Chelated Trace Element Mix (7% Fe, 1.3% B, 2% Mn, 0.06% Mo,
> 0.4% Zn, 0.1% Cu, EDTA, DTPA)
> 2 Tsp (~14g) K2SO4 (potassium sulfate)
> 1 Tsp (~6g) KNO3 (potassium nitrate)
> 2.5 Tbsp (~33g) MgSO4.7H2O (fully hydrated magnesium sulfate, aka epsom
> salts; omit if already present in trace element mix)
> 300mL distilled H2O
> 0.5mL 9M HCl (optional)
> - -------
> 21 Apr 1997 From: Tim Mullins
> ....
> Conlin and Sears' latest PMDD formula
> mix with water to make a 1/2 liter solution,
> 1 tablespoon chelated trace mix
> 1 tablespoon MgSO4+7H2O
> 2 tablespoons K2SO4
> 1 tablespoon KNO3 (varies, depends on your nitrate)
> - ------------
>
> Note the difference in Tsp (tea-spoon) and Tbsp (table spoon)? And also
the
> Epsom salt level ?
>
> Any advice which is the one that most people use ?
>
> Thanks
> dc