Field Trial of PRODIBIO Jan 1

[Aqua-Digital]

This depends on yoru current nutrient load

PO4
NO3

also you need to make sure your mineral levels are correct

DKH - 7-8
MG - 1280 -1350
Ca - 380 - 430

But my concern is you said you had lost a lot of sps, if this was due to a pathogen then Prodi will not stop the same pathogen coming back for a second course.