1. What is Pump Flow Rate?

Pump flow rate determines how much water your pond pump can circulate per hour. Proper pump sizing is essential for maintaining water quality, supporting aquatic life, and ensuring efficient filtration.

2. How Does the Calculator Work?

The calculator uses the pump flow rate formula:

Where:

• \( \text{Pond Volume} \) — Total water volume in gallons
• \( \text{Turnover Time} \) — Desired time to circulate entire pond volume in hours
• \( \text{Pump Flow Rate} \) — Required pump capacity in gallons per hour

Explanation: This calculation ensures your pump can circulate the entire pond volume within your desired timeframe for optimal filtration and oxygenation.

3. Importance of Proper Pump Sizing

Details: Correct pump sizing prevents water stagnation, maintains proper oxygen levels, supports biological filtration, and ensures healthy aquatic environment for fish and plants.

4. Using the Calculator

Tips: Enter pond volume in gallons and desired turnover time in hours. Typical turnover rates are 1-2 hours for koi ponds and 2-4 hours for garden ponds.

5. Frequently Asked Questions (FAQ)

Q1: What is the ideal turnover time for a pond?
A: For fish ponds: 1-2 hours turnover; for plant-only ponds: 2-4 hours; for heavily stocked koi ponds: 1 hour or less.

Q2: How do I calculate my pond volume?
A: Measure length × width × average depth (in feet) × 7.48 for rectangular ponds. For irregular shapes, use multiple measurements.

Q3: Should I consider head height when selecting a pump?
A: Yes! Pump performance decreases with elevation. Add 10-20% capacity for every foot of vertical lift and pipe friction losses.

Q4: What happens if I undersize my pump?
A: Poor water circulation, inadequate filtration, low oxygen levels, algae growth, and unhealthy conditions for aquatic life.

Q5: Can a pump be too powerful?
A: Yes, excessive flow can stress fish, disturb plants, and cause water to overflow filters. Match pump size to your pond's needs.