1. What is Koi Pond Filtration?

Koi pond filtration is the process of circulating and cleaning pond water to maintain optimal water quality for koi fish. Proper filtration removes waste, maintains oxygen levels, and supports beneficial bacteria.

2. How Does the Calculator Work?

The calculator uses the filtration formula:

Where:

• \( Volume \) — Total water volume of the pond in gallons
• \( Turnover\_Rate \) — How many times the water should circulate per hour

Explanation: The equation calculates the required pump flow rate in gallons per hour (gph) needed to properly filter your pond.

3. Importance of Proper Filtration

Details: Adequate filtration is crucial for maintaining water clarity, removing fish waste, and supporting the nitrogen cycle. Koi ponds typically require a turnover rate of 1-2 times per hour.

4. Using the Calculator

Tips: Enter your pond's total water volume in gallons and desired turnover rate (usually 1-2 times per hour). All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's the ideal turnover rate for a koi pond?
A: Most koi ponds benefit from a turnover rate of 1-2 times per hour. Higher rates may be needed for heavily stocked ponds.

Q2: How do I measure my pond's volume?
A: Calculate length × width × average depth × 7.48 for rectangular ponds. For irregular shapes, use salt or dye testing methods.

Q3: Should I get a pump with higher gph than calculated?
A: Yes, it's recommended to get a pump with 10-20% more capacity than calculated to account for head pressure and filter resistance.

Q4: What other filtration components are needed?
A: A complete system typically includes mechanical filtration (solids removal), biological filtration (beneficial bacteria), and often UV clarification.

Q5: How often should I clean my filters?
A: Mechanical filters should be cleaned when flow decreases, while biological media should only be rinsed lightly in pond water to preserve bacteria.