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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.
> 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
> Epsom salt level ?
> Any advice which is the one that most people use ?