If your Crystal Clear Spas water sometimes looks a little off — even when you’re doing everything right — the answer is often sitting inside your filter housing.
Your spa filter plays a critical role in water clarity, hygiene, and overall system performance. With cooler months bringing longer, more frequent soaks, it’s a good time to make sure your filter is actually working with the Crystal Clear system, not against it.
How the Crystal Clear Spas system actually works
Crystal Clear is an enzyme‑based water purification system, not a heavy‑chemical solution. The enzymes break down oils, lotions, sweat, and other organic waste, keeping the water clean, soft, and gentle on skin and equipment.
For this process to work properly, the system relies on consistent water flow and a filter that can handle the volume of broken‑down waste without blocking.
When the wrong filter is used, flow is restricted, performance drops, and water quality suffers — even if everything else is correct.
Why filter micron rating matters
Filters that are too fine are one of the most common causes of problems with Crystal Clear.
Overly fine filters block easily, reducing circulation and making filtration less effective — not more.
For Crystal Clear Spas, the ideal filter rating is 20–40 microns. This allows effective filtration without restricting flow, so the system can operate as designed.
Filters finer than this often lead to cloudy water and ongoing maintenance issues, despite correct water care.
Why we recommend Magnum Filters
For most Crystal Clear customers, the simplest solution is Magnum Filters.
They are:
- Plain white, pleated filters
- Within the recommended 20–40 micron range
- Designed to maintain strong water flow
- Durable and suitable for repeated cleaning
Unlike many blue pleated Microban‑style filters, which are typically designed to last only3–4 months, Magnum Filters can last many years when properly maintained, making them far more cost‑effective over time.
Important:
Only use plain white pleated filters. Avoid blue pleated or Microban filters, as they are usually much finer, block quickly, restrict flow, and are designed for short service life.
If you’re unsure which Magnum Filter suits your spa, send us a photo of your existing filter and we’ll point you in the right direction.
The honeycomb filter issue (and Purezone systems)
Many spas fitted with honeycomb filters were originally designed to run with Purezone (ozone) systems. These filters provide ultra‑fine filtration (often 2–5 microns), which can suit traditional chemical or ozone‑based setups.
Crystal Clear works differently.
As an enzyme‑based system, it needs to continuously move broken‑down waste through the filter. Honeycomb filters are too fine for this job. They block quickly, restrict water flow, and require constant cleaning, causing the system to work harder than it should.
When Crystal Clear is used with a honeycomb filter, common signs include:
- Constant filter cleaning
- Reduced flow
- Water that doesn’t feel as soft or clean as expected
The issue isn’t the Crystal Clear system — it’s a filter designed for a different purification approach.
Retrofitting your spa
The good news is that most spas can be easily retrofitted with a standard white pleated filter.
In many cases, it’s a straight cartridge swap. Some setups may need a small adapter or a different size — if so, just get in touch and we’ll help you work it out.
It’s a simple change, and one of the best improvements you can make when using Crystal Clear.
Small change, big difference
Filters are easy to overlook, but they influence your spa’s performance every day.
The right filter — white, pleated, 20–40 microns, and kept clean — allows Crystal Clear to deliver soft, clear, healthy water with minimal effort and minimal chemicals.
As spa use increases over the cooler months, it’s worth taking a few minutes to check what filter you’re running. A small change here can make a big difference everywhere else.
If you’d like a hand working out what suits your spa, just get in touch. We’re happy to help.
