Hot Tub Serum Total Cleanse | Spa Biofilm Purge
Excluded Brands
The following brands are not eligible for LTI discount codes (including WELCOME). They go on sale only during manufacturer-authorized promotions:
- Gozney — pizza ovens and accessories
- OHCO — massage chairs
- Positive Posture — massage chairs and recliners
- Nomadix — outdoor lifestyle products (towels, blankets, accessories)
Excluded Products
The following individual products are also not eligible for discount codes:
- Any product that already has a price markdown — items on sale or clearance can't stack additional discounts on top
- FreshWater Salt System Replacement Cartridge (single)
- FreshWater Salt System Replacement Cartridge (3 Pack)
- Route Protection Insurance — third-party shipping protection, not eligible for our discounts
- Bullfrog A / R / X Series 10-00282 Filter Cartridges
- Bullfrog STIL Series 10-00281 Filter Cartridges
- FROG® @ease Sanitizer System for Bullfrog Spas
- FROG® @ease Replacement Cartridge for Bullfrog Spas (3 Pack)
- Bullfrog Simplicityâ„¢ Flat Filters for M Series (4 Pack)
- Filter Core Cage & Cap Assembly for Bullfrog Spas
- Fireplaces (gas, wood-burning, and fireplace inserts)
- Electric Fireplaces
- Gas Vent Pipe
- Pellet Vent Pipe
- Fireplace Fronts
This list can change. Manufacturers occasionally add or remove products from their MAP-protected lists. We update this page when they do, but the most accurate way to confirm whether a discount applies to a specific item is to add the item to your cart and try the code at checkout. If the code doesn't work, the item is excluded. If it does work, it's eligible.
Returns On Hazardous Materials
Some of the products we sell — primarily spa and pool chemicals — are classified as hazardous materials by the U.S. Department of Transportation (DOT). These items can't be returned to us by mail, even though we'd like to make returns easy on every product. This page explains why the rule exists, what's covered, and what your options are if you have unopened chemicals you no longer need.
The short version: We can't accept hazmat returns by mail (federal regulations prohibit it), but we can accept them in person at our Idaho Falls, Boise, or Twin Falls showrooms. If a product arrived damaged or defective, that's handled differently — call us right away and we'll work with the manufacturer on a replacement or refund.
Hot Tub Serum Total Cleanse is a biofilm purge gel that deep-cleans the one part of your spa you can never see or scrub: the inside of the plumbing and jets. It's the "remove it" step of the Hot Tub Serum system — run it before a drain-and-refill and it flushes years of bacterial sludge out of the pipes in about 25 minutes.
Biofilm is a slimy layer of bacteria that builds up deep inside spa plumbing, and it causes real problems: foul odors, foaming, cloudy water, and a pH you can't seem to balance no matter how much chemical you add. Because it lives inside the pipes, ordinary water treatment never touches it — it just keeps re-contaminating every fresh fill and quietly eating through your sanitizer. Draining and refilling without purging first simply pours clean water into dirty plumbing.
Total Cleanse fixes that at the source. Its concentrated gel breaks the biofilm loose from the pipe walls and a built-in clarifier lets your filter capture it — and you'll see the proof, as brown sludge and foam rise to the surface. One small 2 oz tube goes a long way: it purges a 400-gallon spa about four times, or a swim spa up to 2,000 gallons in a single use.
Hot Tub Serum®
