WOW, thanks to all for your great comments.
Insteat off "that fish solution, very smelly" I used to take a "chemical" solution of 10/50/6 + 2 MgO, good for the roots. Would wood ash, be helpfull ?
Would be great if you pass a link where to find that "tablet" and about that : " I picked up 9 bottles of transplant starter solution for $ 3 at Walmart awhile back " : is it that Fertilizer Analysis 4-12-4 ??
Thanks in advance, best. Michel