Deep Cleaning for Internal Spa Pipe-Work
SpaCare System Klenz is a concentrated cleaner for internal pipe-work in spa pools, hot tubs, and spa baths, formulated to remove calcium, grime, and organic build-up from within the system.
It helps clean hidden internal areas where harboured body fats, including bio-film, can remain as part of normal spa use, supporting a deeper level of system maintenance beyond visible surface cleaning.
Used as part of scheduled spa care, System Klenz helps keep internal pipe-work and associated systems cleaner during periodic maintenance and water change routines.

Help Clean Hidden Build-Up from Inside the Spa System
Cleans Internal Pipe-Work
Concentrated cleaner for the hidden internal pipe-work of spa pools, hot tubs, and spa baths.
Removes Calcium, Grime, and Build-Up
Helps clean away internal calcium, grime, and organic build-up from within the system.
Supports a Cleaner Fresh Start
Helps prepare the internal system for refilling with fresh water after deeper maintenance.
Helps Remove Hidden Residue
Targets harboured body fats and bio-film within the pipe-work and associated systems.
Supports Deeper System Maintenance
Helps keep internal systems cleaner as part of scheduled spa and hot tub care.
Supports Scheduled Deep Cleaning
Use as part of regular internal system cleaning for normal and heavy-use spa maintenance.
How It Works
SpaCare System Klenz circulates through the internal pipe-work and associated systems of the spa or hot tub during treatment.
As it moves through the system, it helps loosen calcium, grime, organic build-up, harboured body fats, and bio-film from inside the pipe-work and associated areas, so they can be removed during draining and rinsing.

How to Use
For Spa Pools and Hot Tubs
- Remove the filter cartridge from the filter compartment.
- Ensure the water level is at least 50mm above the jets.
- Add 250mL per 1,000 litres of water into the filter compartment.
- Run the spa or hot tub for a minimum of 2 hours.
- Turn the spa or hot tub off for 1 hour.
- Run the system again for a further 30 minutes.
- Drain the spa or hot tub and wash away any debris from around the shell and jets with fresh water.
- Refill with fresh water.
- Sanitise the spa or hot tub with your chosen sanitiser before re-use.
For Spa Baths
- Fill the spa bath with cold water to 50mm above the jets.
- Add the required dose of System Klenz.
- Run the spa bath for 15 minutes.
- Turn off the spa bath and allow the water to stand for 5 minutes.
- Run the spa bath for a further 5 minutes.
- Drain the spa bath.
Dosage & Coverage
- Spa Pools and Hot Tubs: 250mL per 1,000 litres of water
- Spa Baths – Normal Domestic Use: 50mL monthly
- Spa Baths – Normal Commercial Use: 50mL weekly
- Frequency for Normal Spa or Hot Tub Use: At least every 12 weeks
- Frequency for Heavy Spa or Hot Tub Use: Every 6 weeks
Important Usage & Safety Information
- Use before draining the spa or hot tub to help clean internal pipe-work and associated systems.
- Always remove the filter cartridge before treatment.
- After draining, rinse away loosened debris from the shell and jets before refilling.
- Sanitise the spa or hot tub after refilling and before re-use.
This product is classified as Dangerous Goods. Handle with care, avoid contact with skin and eyes, and keep out of reach of children.
Specialised Care for Spas and Hot Tubs
SpaCare by Lo-Chlor is created for the unique needs of spas and hot tubs, where warm water and frequent use demand a more specialised approach to water care.
From water balance and sanitising support to surface care and system cleaning, the SpaCare range works together to help keep your spa clear, comfortable, and inviting.
It is a trusted care system that makes ongoing maintenance feel simpler, so you can spend less time managing your water and more time enjoying it.

Frequently Asked Questions
Do I need System Klenz if the spa already looks clean?
Yes, it can still be useful. System Klenz is intended for the hidden internal pipe-work and associated systems, not just the visible spa surfaces.
Is this the same as Bio-Klenz?
No. Bio-Klenz is used for bio-film removal, while System Klenz is used to remove calcium, grime, organic build-up, and harboured body fats, including bio-film, from inside the spa system.
Why do I need to drain the spa after using it?
System Klenz is used as part of a deeper cleaning process. After treatment, the spa is drained so loosened internal build-up can be removed from the system before refilling.
Can I use it at every water change?
Yes, it can be used as part of a periodic deep-cleaning routine when the spa or hot tub is being drained and refilled.
What if my spa gets heavy use?
For heavier spa or hot tub use, the treatment should be carried out every 6 weeks rather than every 12 weeks.
Can I use this in a spa bath too?
Yes, but spa baths use a different dosage and treatment routine from spa pools and hot tubs.