BioGuard SoftSwim Stain Control | Stain Preventer
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.
BioGuard SoftSwim Stain Control is a sequestrant formulated specifically for the biguanide chemistry of the SoftSwim program. It keeps dissolved iron, copper, and manganese locked in solution so they can't settle out and stain pool surfaces — and it does a second job that matters just as much on a biguanide pool.
It helps maintain the presence of SoftSwim B and C. That's not a minor footnote. Dissolved metals interfere with biguanide sanitizer and clarifier, quietly consuming them and shortening how long a residual holds. On a program where the sanitizer is the single most expensive recurring product, metals in the water are costing you money every week whether or not you ever see a stain.
There's one requirement that's easy to miss and expensive to skip: Stain Control must be used when starting a white plaster pool on SoftSwim B — whether metals are present or not. That's not a recommendation scaled to your water test. It's a condition of the start-up, and it applies to every white plaster SoftSwim pool.
Beyond that, it's needed whenever metals are present in any pool type or in the make-up water, and at spring start-up and after any significant refill — the moments when new water brings new metal into the pool.
Dosing is keyed to a measured metal level rather than pool volume alone: 1 quart per 10,000 gallons controls up to 2 ppm of metals. Above 2 ppm you need proportionally more, plus a filter aid to physically remove what the sequestrant is holding.
Pro Tip: If you're starting a white plaster pool on SoftSwim B, this product is required — metals test or not. BioGuard states it plainly, and the reason is that fresh white plaster is both the surface most likely to show staining and the one where a stain is hardest to remove. A start-up without Stain Control on a new plaster finish is the sort of shortcut that shows up as permanent discoloration on a brand-new surface, discovered weeks later when the only remaining options are a full stain protocol or an acid wash. Get the water tested by a dealer before start-up, add the Stain Control regardless of the result, and the finish stays clean.
BioGuard®
BioGuard® Brand FAQs
What is the BioGuard 3-Step Care System?
It's the brand's core program for traditional chlorine pools, and it reduces routine care to three jobs.Step 1, sanitize— SilkGuard Complete® tabs or sticks maintain a continuous chlorine residual that kills bacteria and controls algae between applications.Step 2, shock— Smart Shock® is applied weekly to oxidize the organic waste bathers leave behind, break apart chloramines, and restore clarity.Step 3, prevent— Algae Complete® stops algae before it establishes rather than fighting it after it blooms. The system works in pools of any size and surface type that circulate 10 to 24 hours per day.
What's the difference between BioGuard and SpaGuard?
They're sister brands from the same water-care company.BioGuard is the swimming pool line. SpaGuard is the spa and hot tub line.The split isn't marketing — pool dosing is calculated for tens of thousands of gallons at ambient temperature, while spa dosing is calculated for a few hundred gallons at 100°F. Pool packaging makes accurate spa measurement nearly impossible, and a pool-sized dose in a hot tub is a serious overdose. Match the product line to the vessel.
Which BioGuard program is right for my pool?
Equipment usually decides it. Pools running a standard chlorinator, feeder, or skimmer application belong on the3-Step Care System. Pools with a salt chlorine generator should be on thesalt pool programs— Mineral Springs® or SaltScapes® — which are formulated around the specific scale, balance, and cell-care demands of a generator. Owners who want no chlorine or bromine in the water at all use BioGuard'snon-chlorine biguanide program, which is a fully separate chemistry with its own sanitizer, oxidizer, and algaecide.
Can I mix BioGuard products with chemicals from other brands?
Basic balancers are chemically generic and generally interchangeable — alkalinity increaser is sodium bicarbonate no matter whose label is on the bucket. The real risk sits withsanitizer programs and specialty additives. Never introduce chlorine or bromine into a biguanide pool; the two chemistries destroy each other and produce cloudy water, gummy filter fouling, and a collapsed sanitizer residual. Also avoid stacking algaecides and clarifiers from different brands, since overlapping actives can cause foaming or staining. And regardless of brand, never combine two products in the same bucket, scoop, or feeder — always add them separately with circulation running between.
What is SilkGuard Technology?
SilkGuard® is a conditioning technology built into BioGuard's chlorinating tabs and sticks. It softens the feel of the water against skin and helps protect pool surfaces and equipment from scale formation, so the sanitizer is doing two jobs at once. SilkGuard Complete® products also carrySunShield® Technology, which shields free chlorine from ultraviolet breakdown. UV loss is the largest single drain on chlorine in an outdoor pool during summer, so protecting the residual directly reduces how much sanitizer you consume over a season.
Do BioGuard products work with salt chlorine generators?
Yes. A salt pool is still a chlorine pool — the generator simply produces the chlorine on site instead of you adding it from a bucket. Salt pools still need balancing, weekly oxidation, algae prevention, and scale protection, and they have one extra demand a standard pool doesn't: the generator cell itself accumulates scale and needs periodic cleaning. BioGuard's salt-specific programs are built around exactly those requirements.Do not skip testing on a salt pool— the automation controls chlorine production, not water balance.
About BioGuard®
BioGuard is a professional swimming pool care line built on a simple premise: pool chemicals work better as a program than as a shelf of unrelated purchases. Most water problems homeowners fight through the summer aren't caused by a bad product. They're caused by good products working against each other, applied out of sequence, in water whose balance was never corrected in the first place. BioGuard's entire approach is organized around fixing that — matched products, a defined order of operations, and a diagnostic process behind the recommendation.
The brand sits under the KIK Consumer Products umbrella alongside its spa counterpart, SpaGuard, and it covers the full range of pool water care: sanitizers, shocks, algaecides, balancers, water enhancers, surface cleaners and problem solvers, salt pool products, and off-season closing chemistry.
Three Programs, One Philosophy
- Traditional Chlorine — the 3-Step Care System — Sanitize, shock, prevent. SilkGuard Complete® tabs and sticks handle daily sanitation, Smart Shock® handles weekly oxidation and clarity, and Algae Complete® handles algae prevention. Suitable for pools of any size and surface type running 10 to 24 hours of circulation per day.
- Salt Pools — Purpose-built chemistry for pools with a chlorine generator, including the Mineral Springs® and SaltScapes® programs. Salt pools still generate chlorine, and they still need balancing, scale protection, and cell care — these products are formulated for that specific equipment set.
- Non-Chlorine Pools — A complete biguanide-based program for owners who want no chlorine and no bromine in the water at all, with its own dedicated sanitizer, oxidizer, and algaecide.
Formulation Technologies
Two proprietary technologies show up across the chlorine line and explain a lot of the brand's reputation. SilkGuard® Technology conditions the water so it feels noticeably softer against skin while also helping protect pool surfaces and equipment from scale. SunShield® Technology protects free chlorine from ultraviolet breakdown, which is the single largest source of chlorine loss in an outdoor pool during summer — sanitizer that survives the afternoon is sanitizer you don't have to replace.
Diagnosis, Not Guesswork
BioGuard is sold through trained specialty dealers rather than mass-market channels, and the brand backs that network with the ALEX® water analysis system. ALEX reads a full water sample — sanitizer, pH, total alkalinity, calcium hardness, cyanuric acid, metals, and more — and returns a sequenced correction plan rather than a generic product suggestion. That distinction matters more than it sounds. Cloudy water has at least six common causes, and the fix for a filtration problem is nothing like the fix for a high-pH problem or a phosphate problem. Testing tells you which one you actually have.
