Nayoku Hot Tub In-Line Replacement Cartridges – Frog @Ease Compatible 4-Pack (Up to 600 gal, CYA Free)

Effortless spa water care with Nayoku

Meet a practical solution designed to keep your hot tub water comfortable, clean, and easy to maintain. Nayoku in-line replacement cartridges are crafted to work with Frog in-line mineral systems in compatible spa models, offering a reliable way to support soft water and simpler upkeep. This 4-pack is tailored for spas up to 600 gallons, aligning with popular brands like Marquis, Caldera, Artesian, and Hot Springs when used with the right line.

What makes it stand out

• ✅ Compatible with Frog in-line mineral cartridge systems for Marquis, Caldera and Hot Springs spas
• ✅ Uses up to 75% less water, helping reduce wear on skin, hair, swimsuits, and tub surfaces
• ✅ Soft water feel can enhance the overall spa experience and make showers and soaks more comfortable
• ✅ Each cartridge lasts approximately 3–4 weeks depending on spa size and usage

What you get and how to use it

• ✅ Includes 4 cartridges in the package
• ✅ Not an OEM product; designed for compatibility demonstration across supported models
• ✅ Simple replacement process that fits the specified 600 gallon category
• ✅ Customer support available if you need help with compatibility or setup

Usage tips: store cartridges away from direct sunlight, replace on the schedule that fits your spa activity, and recycle old cartridges where local guidelines permit. While designed for compatibility, always double-check your spa model to ensure the cartridge is a good match for your in-line mineral system.

Notes on compatibility: this is a generic inert item and is not affiliated with the original manufacturers. Brand names are mentioned only to illustrate compatibility and should be used for reference purposes.