Choosing the right filtration system is one of the most important decisions in building or upgrading a pool. Your filter determines water clarity, day-to-day maintenance, long-term running costs, and compatibility with your property’s plumbing or waste setup.
1. Media Filters (Sand or Glass Media) #
Sand Media (Traditional Option) #
Sand is the traditional medium used in Australian pools and remains cost-effective and simple.
How It Works
Water is pushed through silica sand that traps debris.
| Pros | Cons |
|---|---|
| Low upfront cost | Higher water consumption (backwashing) |
| Simple backwashing | Sand requires replacement every 5–8 years |
| Easy to operate | Only filters down to 20–40 microns |
| Suitable for most pool sizes | Cannot be used on septic/enviro-cycle sites |
Glass Media (Modern Upgrade) #
How It Works
Recycled glass with sharper edges filters finer particles and resists clumping.
| Pros | Cons |
|---|---|
| Filters to 10–20 microns | Slightly higher upfront cost |
| Requires fewer backwashes → saves water | Still needs backwashing |
| Media rarely needs replacing | Not suitable for non-sewer properties |
| More hygienic — resists bacteria |
Recommendation: Always choose glass over sand for lower lifetime cost and better filtration.
2. Cartridge Filters (Single-Element & Multi-Element) #
Single-Element Cartridge Filters #
A single replaceable filter cartridge sits inside the housing.
| Pros | Cons |
|---|---|
| No backwashing → very water efficient | Needs cleaning every 4–8 weeks |
| Filters down to 5–10 microns | Cartridge replacement every 2–3 years |
| Ideal for septic/enviro-cycle properties | Not ideal for large pools |
| Small footprint |
Best For: Plunge & small pools, restricted waste sites.
Multi-Element Cartridge Filters #
Multiple cartridges provide high flow and longer intervals between cleaning.
| Pros | Cons |
|---|---|
| Handles large pools & high bather loads | Higher upfront cost |
| Excellent fine filtration | Replacement cartridges cost more |
| Ideal for heated pools, spas & water features | Larger equipment footprint |
| Less frequent cleaning |
Best For: Medium–large pools with high usage.
Side-by-Side Comparison #
Which Filtration System Should You Choose? #
Choose a Glass Media Filter If: #
✔ You want the simplest system to operate
✔ You have standard sewer access
✔ You prefer minimal maintenance
✔ You want strong overall filtration
Choose a Cartridge Filter If: #
✔ You cannot backwash to sewer (septic/enviro-cycle)
✔ You want superior fine-particle removal
✔ You value water efficiency
✔ You want quieter, cleaner operation
• **Single-element** → Small to medium pools
• **Multi-element** → Medium to large pools, heated systems
Final Thoughts #
Your filter is the heart of your pool system — and selecting the right one will dramatically impact water clarity, maintenance effort, and long-term running costs. Whether you prefer the simplicity of media filters or the water-saving performance of cartridge systems, the best option depends on your pool size, site conditions, and lifestyle.
