We have developed two PPS systems to fit any aquarium and personal preferences.
PPS-Classic
This system runs aquariums indefinitely without water changes. It requires weekly to monthly testing. Water changes are optional.
PPS-Pro, (most recent system)
This is the easiest system ever. There is no testing required and water changes are optional.
Thank you
Edward
http://sites.google.com/site/aquaticplantfertilizer
PPS-Classic
This system runs aquariums indefinitely without water changes. It requires weekly to monthly testing. Water changes are optional.
PPS-Pro, (most recent system)
This is the easiest system ever. There is no testing required and water changes are optional.
Thank you
Edward
http://sites.google.com/site/aquaticplantfertilizer