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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 ?


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