A good cartridge filter keeps your pool water clear, clean, and comfortable all summer long. Thanks to their fine filtration capacity, cartridge filters are known for their efficiency and ease of maintenance. However, it’s essential to choose the right size filter for your pool’s volume.
This guide will help you determine the ideal cartridge filter size based on the type and size of your pool — whether above-ground or in-ground.
Why Is Proper Filter Sizing Important?
A filter that’s too small can lead to high pressure, restricted water flow, and quick clogging, which increases cleaning frequency and reduces system efficiency. On the other hand, a properly sized filter offers optimal filtration, requires less maintenance, and extends the lifespan of your pump and other components.
Recommended Cartridge Filter Size by Pool Volume
For Above-Ground Pools
| Pool Type | Pool Size (Liters) | Filter Size | Models |
| Above-ground | 15' Round (21,600 liters) | 200 sq. ft. | ➔ Shop now |
| Above-ground | 18' Round (31,200 liters) | 200 sq. ft. | ➔ Shop now |
| Above-ground | 21' Round (42,400 liters) | 200 sq. ft. | ➔ Shop now |
| Above-ground | 24' Round (55,200 liters) | 200 sq. ft. | ➔ Shop now |
| Above-ground | 27' Round (70,000 liters) | 300 sq. ft. | ➔ Shop now |
| Above-ground | 30' Round (86,400 liters) | 400 sq. ft. | ➔ Shop now |
For In-Ground Pools
| Pool Type | Pool Size (Liters) | Filter Size | Models |
| In-ground | 12' x 24' (32,628 liters) | 200 sq. ft. | ➔ Shop now |
| In-ground | 14' x 28' (44,391 liters) | 200 sq. ft. | ➔ Shop now |
| In-ground | 16' x 32' (58,003 liters) | 300 sq. ft. | ➔ Shop now |
| In-ground | 18' x 36' (73,487 liters) | 400 sq. ft. | ➔ Shop now |
| In-ground | 20' x 40' (90,847 liters) | 500 sq. ft. | — |
* Figures are for reference only.
* Above-ground pools: based on an estimated depth of 52".
* In-ground pools: based on an estimated depth of 48".
Need Personalized Advice?
Our Trévi experts are available in-store and online to help you choose the cartridge filter best suited to your pool and your swimming habits. Feel free to ask for a recommendation or browse our full selection online.