Water Care & Filtration

Filtration, salt systems, ozone, and UV — keeping a large volume of water clean with the least hassle.

A swim spa holds a lot of water, and keeping it clean is an ongoing part of ownership. The good news: modern filtration and water-care systems make it far less work than people fear. The goal is clean, clear, safe water with the least hands-on effort — and the systems you choose at purchase time shape how much effort that is.

Filtration

Filtration physically removes debris and particles as water circulates. Look for adequate filter capacity for the water volume and, just as importantly, easy access — you'll be rinsing and periodically replacing filters, so a filter that's a chore to reach becomes a chore you skip. Some brands market self-cleaning or high-flow filtration designs; the practical questions are how much it filters, how often you service it, and how easy that service is.

Sanitizer: the non-negotiable

Every swim spa needs a sanitizer to keep water safe — most commonly chlorine or bromine. The systems below don't replace sanitizing; they reduce how much you do by hand and can make the water feel nicer.

Salt water systems

A salt system dissolves salt in the water and generates chlorine automatically from it. The result is softer-feeling water and far less manual chlorine dosing. It's not "chlorine-free" — it makes chlorine — but many owners love the low-maintenance feel. Salt cells are a wear item to eventually replace, and salt can be hard on some components over time, so confirm the unit is built for it.

Ozone and UV

Ozone (O₃) and UV-C are supplemental systems that destroy contaminants as water passes through the equipment, reducing your sanitizer demand. They run quietly in the background and are popular for cutting chemical use. They're add-ons to — not replacements for — a primary sanitizer.

System	What it does	Main benefit	Note
Filter + sanitizer	Removes debris, kills pathogens	The essential baseline	Required on every unit
Salt (chlorine generator)	Makes chlorine from salt	Less hand-dosing, softer water	Cell wears out; ensure salt-ready build
Ozone	Oxidizes contaminants	Less sanitizer needed	Supplement, not a replacement
UV-C	Neutralizes microbes with light	Less sanitizer needed	Supplement, not a replacement

Most setups combine the baseline with one or more supplements.

Set yourself up for low effort

At purchase, prioritize easy filter access, a quiet circulation pump that filters around the clock, and whichever supplemental system fits your tolerance for chemistry. Then follow a simple routine — our Water Care 101 and maintenance checklist make it straightforward.

Beware 'no chemicals' claims

No system makes a swim spa truly chemical-free. Salt, ozone, and UV all reduce — not eliminate — the need to sanitize and balance the water. Treat absolute "chemical-free" marketing with healthy skepticism.

With the unit itself understood, it's time to get it home and set up: installation and placement.