Description
The Nature2 Nature2 Spa Stick W20750 uses mineral technology to help keep water clean and soft-feeling while reducing how much chlorine you need. It is rated for pools up to about 500 gallons.
Nature2 Spa Stick is a drop-in mineral cartridge that sits in the spa filter core and reduces chlorine/bromine demand. Below we cover how it works, how to size it, how to install it and what maintenance looks like.
Quick Answer: What Is the Nature2 Nature2 Spa Stick W20750?
The Nature2 Nature2 Spa Stick W20750 is a mineral sanitizing system for up to about 500 gallons. Minerals such as silver and zinc help control bacteria and algae and work alongside a reduced level of chlorine or other oxidizer.
Nature2 Nature2 Spa Stick W20750 Specifications
| Brand | Nature2 |
|---|---|
| Equipment Type | Mineral Sanitizer |
| Model Number | W20750 |
| Product Line | Nature2 Spa Stick |
| Pool Size (gal) | 500 |
| Warranty | 1 year limited |
Key Features of the Nature2 Nature2 Spa Stick W20750
- Treats spas and hot tubs up to 500 gallons
- Drops into the spa filter cartridge core; no plumbing
- Works with all spa flow rates
- Lasts about 4 months
- EPA registered
- Use with a non-chlorine oxidizing shock
How Mineral Sanitizers Work
Mineral systems release small amounts of minerals into the water as it passes through a cartridge. Silver helps control bacteria and zinc helps control algae. Minerals do not replace an oxidizer entirely, so you still maintain a low level of chlorine or use a non-chlorine shock, but most owners use significantly less chlorine than with a traditional program. The result is water that many people find gentler on skin, eyes and swimwear.
Mineral cartridges are easy to change and do not require electrical connections in most designs. Because the minerals work continuously, they help keep water quality more stable between chemical additions, and they pair well with automatic chlorinators or tablet feeders set to a lower output. Always follow the cartridge replacement schedule, because spent minerals no longer provide the same level of protection.
How to Size a Salt System
Salt systems are rated by maximum pool size, but that rating assumes ideal conditions. Hot climates, heavy bather loads, lots of sun, and a pump that runs fewer hours all increase chlorine demand. A common rule of thumb is to choose a system rated for at least 1.5 times your pool volume so it can run at a moderate output and the cell lasts longer.
Match the mineral cartridge to your pool or spa volume and replace it on the schedule in the manual.
Good, Better, Best: Where the Nature2 Nature2 Spa Stick W20750 Fits
At HVAC365 we organize every category into a simple Good, Better, Best framework so you can compare options without wading through jargon. Within our salt and mineral sanitizer lineup, this model sits in the Good tier: Essential features at a great value.
The Good tier is built around affordability and simplicity. You get dependable, proven equipment without paying for extras you may never use. It is the smart pick for first-time buyers, straightforward replacements, and bulk B2B or government purchases where consistent, budget-friendly specs matter most.
Not sure the Good tier is right for you? Compare it with the Better and Best options in the same category. Whatever tier you choose, the equipment is brand new and covered by the full manufacturer warranty, and our team is here to help you weigh features against budget.
Installation Tips
Install the mineral system according to the manufacturer's instructions, typically in-line on the return or in a skimmer or feeder. Balance the water first and set your oxidizer to the reduced level recommended for mineral use.
Maintenance
- Test free chlorine, pH and total alkalinity weekly, and salt and stabilizer monthly.
- Salt pools tend to drift toward higher pH; keep it in the recommended range to protect the cell and surfaces.
- Inspect the cell every few months. If you see scale, clean it with the manufacturer's recommended solution.
- Most cells last several years depending on run time, output and water balance; replacement cells are available when needed.
- Protect the cell from freezing in winter.
Salt Systems by Region
In the South and Sun Belt, warm water and intense sun drive up chlorine demand, so size generously and keep stabilizer in range. In hard-water areas such as the Southwest, scale builds faster on cell plates, so check the cell more often. In northern climates, most cells stop producing chlorine in cold water, so supplement with liquid chlorine during spring opening and winterize the cell when the pool closes.
What's Included and Compatibility
This listing is for the Nature2 Nature2 Spa Stick W20750.
Manufacturer warranty: 1 year limited.
Ideal for:
- Hot tubs up to 500 gal
- Owners wanting lower chlorine or bromine levels
Salt and Mineral Systems vs Traditional Chlorine
Traditional chlorine programs rely on tablets, liquid or granular chlorine that you buy, store and add regularly. Salt and mineral systems automate much of that work. A salt system makes chlorine on site, so you skip storing and handling chemicals, and the chlorine level stays more consistent day to day. Mineral systems reduce how much chlorine you need. Both still require regular testing and water balance, and both work best when the pump runs long enough each day to circulate the water through the system. Over a few seasons, the savings on chemicals often offset much of the up-front cost.
Salt systems also make life easier for property managers and service companies. With consistent chlorine output, fewer chemical deliveries and simple digital readouts, pools stay in range between visits, and many controllers integrate with automation for remote monitoring. For homeowners, the softer feel of the water and the freedom from weekly chlorine runs are the most common reasons for switching.
Built for Homeowners, Contractors and Property Managers
- Homeowners: use our sizing tools and the pool math on this page, then reach out with your pool size, location and existing equipment. We will help you confirm the right model before you order.
- Contractors and installers: order in two clicks, follow every shipment with live tracking, and reorder common parts from the HVAC365 Contractor Portal. We know the labor shortage is real, so we focus on getting the right part to the job the first time.
- Property managers: manage equipment for multiple properties from one dashboard and book a strategy call with our team to standardize models, plan replacements and control maintenance costs.
Frequently Asked Questions About the Nature2 Nature2 Spa Stick W20750
What size pool is the Nature2 Nature2 Spa Stick W20750 for?
Up to about 500 gallons per the manufacturer. Many owners size up for hot climates or heavy use.
Does a salt pool taste salty?
Mineral systems do not add salt.
Do I still need chlorine?
Yes, a reduced level of chlorine or another oxidizer is still needed alongside minerals.
Will salt damage my equipment?
Properly maintained salt pools are compatible with most modern equipment. Keep water balanced and check that heaters, lights and natural stone are rated for salt.
How long does a salt cell last?
Often several years, depending on run hours, output setting and water chemistry.
What warranty does it have?
1 year limited.
