Hot Tub Things® 281 AntiMicrobial Filter 2-Pack – Compatible with Bullfrog® 10-00810
Check Compatibility Before You Buy
Frequently Bought Together
Why Shop With Hot Tub Things?
Authentic & Genuine Products
Shop trusted inventory of original spa parts.
Competitive Pricing
Built value for genuine spa care.
Expert Customer Support
Need help finding the right item? We can assist.
Great Everyday Value
Strong fit and quality without overpaying.
Fast Free Shipping
Free shipping on orders $100+.
Satisfaction Guaranteed
Supported by our easy return process.
Key Features & Benefits
Perfect Compatibility
Direct replacement designed to match Bullfrog® spa filter 10-00810 for a precise, secure fit. Engineered to integrate seamlessly with your spa’s filtration system for reliable performance.
Advanced Antimicrobial Protection
Engineered for seamless compatibility with original mounting points for secure placement.Built-in antimicrobial technology helps inhibit bacteria growth on the filter media. This added protection supports cleaner filtration and helps extend the overall life of the filter.
Convenient 2-Pack Value
Includes two filters so you always have a clean replacement ready when needed. This value pack helps reduce downtime and saves money compared to purchasing individually.
Superior Filtration Performance
Captures fine debris and contaminants for clearer, healthier water. High-efficiency media helps maintain balanced water while reducing strain on your spa system.
Quick, Tool-Free Installation
Drop-in replacement design allows for fast and easy installation without tools or modifications. Simply remove the old filter and insert the new one in seconds.
Durable, Long-Lasting Construction
Made in the USA using premium materials designed to withstand chemicals, UV exposure, and repeated cleanings. Built for a typical lifespan of 12–18 months with proper maintenance.
Product Overview
The Hot Tub Things® 281 AntiMicrobial Filter 2-Pack is a premium aftermarket replacement engineered for Bullfrog® STIL5 and STIL7 spas built from 2018 onward, and compatible with 2015–2017 models when paired with Bullfrog's Filter Cage Core Assembly (#10-00417). Each cartridge is a direct cross-reference for Bullfrog OEM part 10-00810 (also listed as 10-00281 / Wellspring 18 Coreless) and the Pleatco PBF17-M equivalent, so it drops straight into your existing filter housing with no modification.
Built-in antimicrobial protection actively inhibits bacterial growth between cleanings, helping your spa water stay fresher for longer and reducing how often you need to pull the filter for maintenance. The pleated media provides 27 square feet of filtration area, giving you the surface area needed to keep debris and contaminants out of your spa's circulation system. Buying the 2-pack means you always have a spare cartridge on hand, so you're never caught without a clean filter on filter-change day — just rotate one in while the other soaks and dries.
This is a Hot Tub Things® aftermarket filter, not an OEM Bullfrog®-branded product, but it's built to the same fit and filtration standard, so you get genuine performance at a better price. Whether you're doing routine maintenance or replacing a filter that's reached the end of its service life, this 2-pack keeps your STIL Series spa running clean without the wait or markup of ordering directly from Bullfrog.
Frequently Asked Questions
-
Rinse every 2–4 weeks; deep clean monthly; expect 3–6 months of service depending on usage.
-
Replace Bullfrog filters every 12-18 months depending on usage frequency. Clean filters weekly with a hose rinse and deep clean monthly with filter cleaner to maximize lifespan.
-
Yes, antimicrobial filters with Microban® technology inhibit bacterial growth, reduce odors, stay cleaner longer, and improve water quality. They're especially beneficial for heavily-used spas or those in warm climates.
-
Never run your spa without a filter. Doing so allows debris and contaminants to circulate freely, potentially damaging your pump, heater, and jets while creating unsafe water conditions. Always have a spare filter available.
-
Rinse weekly with a garden hose or filter wand. Monthly, soak the filter overnight in Hot Tub Things® Cartridge Cleaner, rinse thoroughly, and allow to dry before reinstalling. Rotate with your spare filter during cleaning.
-
Cloudy water with a new filter typically indicates water chemistry imbalance, not a filter issue. Test and balance pH, alkalinity, and sanitizer levels. If problems persist, check for high TDS (total dissolved solids) or inadequate filtration time.
-
The 281 filter has identical openings on both ends (2-1/8 inches), so there's no specific top or bottom. However, rotating the filter 180 degrees during reinstallation can promote even wear.
Related Products
