Instant Filter Cleaner

Quick-dissolve filter cleaner that lifts oils and lotions in 60 minutes, with no overnight soak. Ideal for between-soak top-ups when filter pressure has just begun to climb.

Lifts surface oils and lotions in 60 minutes.
Restores up to 70% of lost filter flow without removing the cartridge.
Adds no foam, scale or sanitiser interference.
Extends the gap between full overnight soaks.
Compatible with chlorine, bromine and salt systems.

Sizes and prices

1L: £19.94
2.5L: £32.60
5L: £53.70
10L: £95.91
20L: £180.32
25L: £222.53

When you need it

Filter pressure has risen 10-15 kPa above baseline.
Jets feel slightly weaker after a heavy soak session.
You need a quick clean before guests arrive.
It is between scheduled overnight soaks.
You want to maintain filter performance week to week.

How to use

Test sanitiser; ensure free chlorine is below 5 ppm or bromine below 8 ppm.
Pour 100 ml of Instant Filter Cleaner per 1500 L into the skimmer with the pump on high.
Run the jets on full for 60 minutes, uncovered.
Test sanitiser and pH; adjust if required.
Resume normal use; deep-soak the cartridge at the next scheduled service.

Dosing guide

Use no more than once per week. The product is designed as a top-up between scheduled deep cleans, not as a replacement.

For 1,000 L (small spa), add 65 ml to reach Top-up clean.
For 1,500 L (typical hot tub), add 100 ml to reach Top-up clean.
For 2,000 L (large hot tub), add 130 ml to reach Top-up clean.
For 5,000 L (swim spa), add 330 ml to reach Top-up clean.
For 1,500 L, add 150 ml + 90 min to reach Pre-guest quick clean.

How it works

A low-foaming liquid blend of fast-action surfactants and bio-degradable chelators formulated to dissolve oily soiling within minutes rather than the hours needed for a soak.

Surfactants emulsify body-oil films at the cartridge surface so oils flow into the bulk water and are caught by the next filter pass. Chelators bind iron and calcium so they too release from the pleat surface. The whole cycle completes in 60 minutes of full circulation.

Cartridge filters lose 10-20% of flow per week of use, mostly to surface oil glaze. An in-tub top-up clean restores flow without the downtime of a soak, keeping the spa ready to use between full service intervals.

Frequently asked questions

How quickly does it work?

60 minutes of full circulation lifts surface oils. Deep matting still needs an overnight soak.

How often can I use it?

Once per week as a top-up between full overnight soaks.

Do I have to remove the cartridge?

No. The product is dosed into the skimmer and works with the cartridge in place.

Will it replace my monthly soak?

No. It complements the soak by maintaining flow between services.

How many doses does 1 L cover?

Around 10 doses for a 1500 L hot tub.

Is it safe for salt and bromine systems?

Yes. It is salt-cell safe and compatible with chlorine, bromine and MPS sanitiser systems.

Why does it not need a soak?

The fast-action surfactants emulsify oils at far higher rates than soak chemistry, so a single circulation cycle is enough.

Will it damage paper pleats?

No. The dilute concentration in tub water is well below thresholds for paper or polyester pleat damage.

Does it affect pH?

Marginally. Expect a 0.1-0.2 pH lift, which usually self-corrects within 24 hours.

Flow is still poor after dosing?

Cartridge is matted. Run an overnight soak with Filter Cartridge Cleaner.

Cloudy water after dosing?

Run filter for 4 hours; add 50 ml clarifier per 1500 L if cloudiness persists.

Foam appearing?

High organic load. Dose Foam Away and schedule the next overnight soak.

Instant cleaner vs cartridge soak?

Soak is for full reset every 4 weeks; instant cleaner is the in-between top-up that holds flow steady.

Instant cleaner vs hot tub flush?

Flush is for pipework before draining. Instant cleaner is for the live filter cartridge between services.