Is your pool water looking cloudy, your pump working overtime, or the jets losing pressure? 

These are common warning signs that your pool filter might be overdue for a professional cleaning.

Ignoring a dirty filter doesn’t just affect how your pool looks; it can damage your pump, waste energy, and throw off your water balance.

In Perth’s warm climate, where pools run almost all year, filters work overtime trapping dust, pollen, and fine debris. 

Before small problems turn into costly repairs, here are five signs it’s time to call in the experts.

Why Your Pool Filter Matters More Than You Think

Your pool filter is the heart of your circulation system. Every litre of water passes through it, removing dirt, sunscreen, and microscopic debris that your skimmer can’t catch.

Over time, those particles build up inside the filter’s medium (cartridge, sand, or DE), restricting water flow and putting pressure on your pump. 

In Perth, where dry winds and high calcium levels are common, filters can clog up faster than you realise.

A well-maintained filter doesn’t just keep your pool clear; it also:

• Improves water circulation and chemical balance
• Extends pump life and reduces energy use
• Prevents algae and bacterial growth
• Saves money on premature repairs

Regular professional cleaning by 1 Pool Care ensures your filter works efficiently year-round, so you can enjoy a sparkling, healthy pool with less maintenance stress.

1. Cloudy or Murky Pool Water

If your pool water looks dull or cloudy even after a chemical shock or brushing, your filter may be clogged.

A dirty filter struggles to trap fine particles, letting dust and organic debris recirculate into the water.

Expert tip: If your pool isn’t crystal clear within 24–48 hours of normal filtration, it’s likely time for a professional deep clean.

2. Increased Pressure on the Filter Gauge

Your filter’s pressure gauge is one of the simplest diagnostic tools available. When it consistently reads 8–10 PSI higher than normal, it means the filter media is clogged with dirt and restricting flow.

What happens next: The pump works harder, wasting energy and risking burnout. Cleaning or replacing the filter media can instantly restore performance.

3. Weak Water Flow or Return Jets

Notice your pool jets losing pressure or uneven water circulation? That’s a strong sign of a blocked filter or impeller. 

Reduced flow means your pool isn’t filtering enough water per hour, allowing debris to accumulate.

Pro insight: Check for air bubbles in the return lines, which is often another indicator of a clogged or air-starved system.

4. Frequent Algae Growth or Cloudiness After Cleaning

If algae or cloudy water keeps coming back soon after you’ve cleaned your pool, your filtration system is underperforming.

When the filter can’t capture fine organic material, algae spores flourish even with correct chlorine levels.

Recommended fix: Schedule a professional filter inspection and deep clean. Experienced technicians can disassemble and chemically clean the filter, restoring full flow and trapping efficiency.

5. It’s Been Over 6 Months Since Your Last Filter Clean

Most Perth homeowners should clean cartridge or sand filters every 3–6 months, depending on usage and debris levels.
If you can’t remember the last time it was done, it’s definitely time.

Why it matters: A neglected filter not only reduces water quality but also increases long-term running costs. Regular maintenance keeps your entire system balanced and efficient.

When to Call a Professional

DIY backwashing or hose-rinsing can only do so much. Without a full disassembly and proper cleaning solution, oils, calcium, and fine debris remain trapped in the filter.

If you’re experiencing cloudy water, high PSI readings, or slow jets, don’t wait for your pump to give up. 

The team at 1 Pool Care is Perth’s SPASA-accredited pool experts with over 30 years of experience in maintenance, filter cleaning, and equipment servicing.

Conclusion

Your pool filter plays a crucial role in keeping your water clean, balanced, and safe to swim in. Cloudy water, high pressure readings, weak flow, recurring algae, or a long gap between cleanings are all clear indicators that your filter needs professional attention. Ignoring these signs can lead to costly equipment damage and unhealthy swimming conditions. To keep your pool performing at its best, schedule a professional inspection and filter clean with 1 Pool Care — Perth’s trusted SPASA-accredited experts with over 30 years of experience in pool maintenance and equipment care.