Filter balls needed depend on pool size and filter capacity
Filter balls replace sand in pool filters, offering better filtration with less weight. The amount needed depends on your filter's capacity and the manufacturer's recommendations. Typically, 700 grams of filter balls replace 10 kilograms of sand.
How to calculate filter balls needed
- Check your filter's sand capacity (usually in kg)
- Divide sand weight by 10 to get filter ball weight needed
- Most 300mm filters need 300-400g of filter balls
- 700mm filters typically require 1.5-2kg of filter balls
Comparison of filter media options
| Media Type | Weight Needed | Filtration Size | Lifespan |
|---|---|---|---|
| Sand | Full filter capacity | 20-40 microns | 3-5 years |
| Glass | 80% of sand weight | 5-10 microns | 7-10 years |
| Filter Balls | 10% of sand weight | 3 microns | 5-7 years |
Installation tips for filter balls
Fill the filter to about 2/3 capacity with filter balls. Do not overfill as balls need space to move during backwashing. Remove any old sand completely before adding filter balls. Backwash the filter for 2-3 minutes after installation to settle the balls properly.