Re: PPS Perpetual Preservation System We have developed two PPS systems to fit every aquarium and personal preference. 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. For the latest PPS-Pro system please see PPS-Analysis-and-feedback Forum.
Last edited by Edward : 08-26-2007 at 06:49 AM.
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