PPS: http://www.aquaticplantcentral.com/forumapc/showthread.php?t=2303
EI: http://www.aquatic-plants.org/est_index1.html or check out the Barr Report
I've had fewer headaches since using dry ferts.
EI: http://www.aquatic-plants.org/est_index1.html or check out the Barr Report
I've had fewer headaches since using dry ferts.
