HydroSurge Weekly Spa Care | Weekly Hot Tub Water Care
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 Simplicity™ 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.
HydroSurge Weekly Spa Care is a weekly water care product that keeps your spa clean from the inside out, and this 64 oz (64 fl oz) bottle is the value size — roughly 24 weekly doses, or four to six months of supply for most spas. This proven formula — the well-known “purple liquid” — targets the one place ordinary chemicals can’t reach: the residue that builds up inside your plumbing and jets. Added once a week alongside your sanitizer, it keeps that buildup from taking hold.
What accumulates inside your spa’s plumbing is the hidden problem in hot tub care. Buildup forms on interior pipe surfaces where nothing else reaches, and it’s notoriously hard to clear once established — it keeps re-contaminating your water, driving cloudy water, odors, and constant sanitizer demand no matter how carefully you dose. Weekly Spa Care stops that cycle: it keeps the plumbing clean so contaminants can’t hide and multiply, and it makes your existing sanitizer noticeably more effective by dispersing what’s in the water so the sanitizer can reach it.
The result is water that stays crystal clear, soft, and fresh-smelling with less effort — and because your sanitizer works better, you typically end up using less of your other chemicals overall. It also helps keep water clean and clear and smooths out pH swings.
Pro Tip: The 64 oz size is the one to choose if you’re on an auto-ship or dealer program. Serum Watercare’s Lifetime Jet Warranty is tied to regular weekly use of the 64 oz bottles through an authorized dealer’s auto-ship program — so buying this size and using it consistently is what keeps that jet coverage in force.
Brand
HydroSurge®
