"M Walczak" wrote

what is PMDD?

PMDD
Poor Man's Dupla/Dosing Drops

http://www.nfis.com/~hartland/aqua/pmdd.htm
http://www.thekrib.com/Plants/Fertilizer/pmdd-tim.html

--
Graham Ramsay
Blairgowrie (UK)
www.ibrox.freeserve.co.uk/aquarium.htm