Hot Tub Things® 281 AntiMicrobial Filter 2‑Pack – Compatible with Bullfrog® STIL Series Spas

Designed as a direct replacement for Bullfrog® STIL Series coreless filters (Part #10‑00810), optimized for Wellspring™ filtration systems on 2018+ spas.

Made with Microban® antimicrobial technology, this filter inhibits bacteria and mold, helping to minimize unpleasant odors and reduce cleaning frequency.

Features a coreless pleated design that maximizes filtration surface area while improving water flow, and eliminates the need for rigid internal cores.

Constructed from durable media capable of capturing fine debris, oils, and contaminants, ensuring cleaner, clearer spa water.

A washable and reusable cartridge—simply rinse every 2–4 weeks and deep-clean monthly to prolong filter life and performance.

Easy to install—drop-in design, no adapters or tools required. Includes two cartridges per pack for both filter positions.

Cost-effective and eco-conscious, this replacement preserves spa efficiency while reducing plastic waste.