Regime
PPS-Pro
Philosophy
The Perpetual Preservation System (PPS-Pro), formulated by Edward, follows a philosophy of conservative balance and long-term stability. Unlike the high-dose strategy of the Estimative Index, PPS-Pro aims to feed plants daily by dosing precise, minimal amounts (micro-doses) calculated to meet the exact daily consumption rates of the plant mass, thus preventing any accumulation of nutrients in the water column.
This approach dramatically reduces nutrient buildup and the need for frequent, large water changes, making it ideal for low-to-medium tech setups, community tanks, or hobbyists seeking lower maintenance (requiring only 10-20% water changes every 1-2 weeks). Chemical stability is maintained steadily, avoiding the sudden fluctuations typical of systems that rely on large resets. The success of PPS-Pro depends on daily dosing consistency and requires an initial calibration matching the tank's unique bio-mass and light levels.
Recommended nutrient targets
| Parameter | mg/L |
|---|---|
| N (NO₃) | 10 |
| P (PO₄) | 1 |
| K | 20 |
| Fe | 0.1 |
| Mg | 3 |
| Ca | 15 |
| B | 0.01 |
| Mn | 0.1 |
| Zn | 0.01 |
| Cu | 0.005 |
| Mo | 0.001 |
Dosing frequency
Daily (same dose every day)
Water change
10-20% every 1-2 weeks
CO2
Optional
Light
Low-medium (20-50 PAR)
Pros
- Fewer water changes
- Simple, consistent dosing
- Great for low-tech
- Low fertilizer consumption
Cons
- Requires initial calibration
- Not suited for very fast-growing tanks
- Less documented than EI
Common Errors
- •Skipping daily doses: since they are calculated to the milligram, a missed day is a missed meal.
- •Using it in tanks with extremely high lighting where consumption exceeds the dosing rate.
Advanced Techniques
- •Prepare solutions in bottles with an automatic smart dosing pump for micro-doses split 3 times a day.
Ideal for
Stable low-tech or medium-tech tanks with moderate-growth plants.
