vey very reasonable.
cheap even.
i use it with flourish and flourish excel.
its great stuff. contains the trace elements you need.
plants love it... so do fish with hole in the head disease.
you mix it up at home (just like in chem class minus the explosions, and burning benches ).
PMDD - Poor Mans Dupla Drops.
PS- if you google it, you may want to google "PMDD fertiliser" and not just PMDD