BioGuard Super Soluble | Stabilized Pool Chlorine

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Description

BioGuard Super Soluble is a fast-dissolving, stabilized granular chlorine concentrate that sanitizes a pool without the drawbacks that come with tablet feeding. It's the answer for pool owners who want chlorine they can measure, apply, and see dissolved in seconds — with no feeder to maintain and no tablet sitting anywhere it shouldn't.

The formulation is 99% active ingredient delivering 56% available chlorine, with almost nothing in the bag that isn't doing work. That purity is why it dissolves completely and leaves no residue to cloud the water, and it's a meaningful difference from cheaper granular chlorine that carries fillers straight into your filter.

The other distinguishing property is what it doesn't do to your balance. Trichlor tablets are strongly acidic and pull pH and total alkalinity downward all season, which is why tablet-fed pools need acid corrections in one direction and then base corrections in the other. Super Soluble is essentially pH neutral in use, so it sanitizes without dragging your chemistry along behind it. For an owner tired of chasing pH every week, that alone can be the reason to switch.

It's particularly well suited to small above-ground pools and in-ground vinyl-lined pools. Both are cases where tablets are awkward or risky — small pools are easily overdosed by a floater, and a tablet that drifts against a vinyl liner or gets left in a skimmer can leave a permanent bleached mark. Granular chlorine broadcast across the deep end avoids that failure mode entirely, provided it's applied correctly.

Available in 5 lb and 25 lb sizes, so you can buy a season's worth for a small pool or stock a larger one without constant reordering.

Pro Tip: Test cyanuric acid monthly if this is your primary sanitizer — not once at opening. Super Soluble is stabilized dichlor, which means every dose permanently adds cyanuric acid to the pool. At a daily maintenance rate of 2–3 oz per 10,000 gallons, that adds up considerably faster than a weekly shock does. Once stabilizer climbs past roughly 100 ppm, free chlorine becomes progressively less effective at the same test reading, and your pool looks properly chlorinated while behaving like it isn't. Stabilizer never burns off, evaporates, or filters out. Partial drain and refill is the only correction, so it's much cheaper to watch the number than to discover it in August.

Brand

BioGuard®

What's in the Box
  • 1 x BioGuard Super Soluble container, in your selected size
  • Full manufacturer label with dosing rates, start-up directions, and safety information

Available in 5 lb and 25 lb.

Key Features

99% Active Ingredient

Almost the entire contents of the container is working chlorine. There's very little filler to dissolve, settle, or load the filter, which is what allows it to go into solution as completely as it does.

56% Available Chlorine

A concentrated stabilized chlorine source that delivers a strong residual from a modest dose, keeping both the amount you handle and the amount you store manageable.

Quick Dissolving, No Residue

Goes into solution rapidly and leaves nothing behind to cloud the water. Cheaper granular products often deposit undissolved material that clouds the pool and then has to be filtered back out.

Does Not Lower pH

Essentially pH neutral in use, unlike trichlor tablets, which are strongly acidic and pull pH and total alkalinity down continuously. Sanitizing with this product doesn't set off a rebalancing cycle.

Stabilized Against Sunlight

The chlorine source is stabilized, so the residual resists ultraviolet breakdown and lasts longer through a sunny day than an unstabilized product would.

Restores Water Clarity

Bringing the chlorine residual back into range clears the water by oxidizing the organic load that makes a pool look dull and hazy.

Ideal for Small and Vinyl-Lined Pools

Purpose-suited to small above-ground pools and in-ground vinyl-lined pools, where tablet feeding is either impractical at that volume or carries a real risk of bleaching the liner.

Two Sizes and Full Dose Control

Available in 5 lb and 25 lb. Separate rates for start-up, daily maintenance, and superchlorination let you match the dose to the situation instead of relying on a feeder setting to guess for you.

How It Works

The active ingredient is sodium dichloro-s-triazinetrione dihydrate at 99% — dichlor. When the granules contact water they dissociate and release hypochlorous acid, the form of chlorine that actually sanitizes. Hypochlorous acid destroys bacteria and other microorganisms by disrupting their cell structure, and it oxidizes the organic waste swimmers leave behind.

The dihydrate form is what sets this product apart from other dichlor products. Two water molecules are built into the crystal structure, which lowers the available chlorine to 56% compared to roughly 62% for the anhydrous form. That sounds like a disadvantage and isn't. The bound water is precisely what makes the granules dissolve as fast and as completely as they do, and it makes the product gentler and more stable to handle. You trade a few percentage points of concentration for solubility, and for a granular sanitizer that's the right trade.

Dichlor is also near pH neutral in solution, sitting close to 7 rather than down near 3 where trichlor sits. This is the single biggest practical difference between granular dichlor and tablet trichlor. A tablet-fed pool needs continuous acid management because the sanitizer is dragging pH down every day. A dichlor-fed pool largely doesn't.

Because dichlor is a stabilized chlorine source, it contributes cyanuric acid as it dissolves. Cyanuric acid acts as sunscreen for free chlorine, slowing UV breakdown so the residual survives longer through the day. The tradeoff is permanent accumulation — stabilizer doesn't leave the pool on its own.

One thing to understand clearly: dichlor granules are still concentrated chlorine, and a granule resting on a pool surface creates an intensely concentrated spot right against the finish. That's why the label calls for broadcasting into the deep end with the pump running and brushing anything that settles. It's also why cold water changes the procedure — below 70°F the granules dissolve slowly enough that pre-dissolving in a bucket becomes the safer approach.

Pro Tip: Never let undissolved granules rest on a vinyl liner. Bleaching a liner is permanent, it isn't covered by anything, and it's entirely avoidable. Broadcast into the deep end with the pump running, then brush the floor to disperse anything that settled. In water below 70°F, pre-dissolve instead: outdoors, in a clean plastic bucket, with a clean plastic or wooden spoon, and never more than 1 lb of product per 3 gallons of cool water. Always add the product to the water, never water to the product, and never pre-dissolve two chemicals together in the same bucket. Cold-water openings are exactly when people skip this step and exactly when the granules take longest to dissolve.

Directions for Use

Dosage Reference

  • Initial treatment: 4 oz per 10,000 gallons, repeated until a 1–3 ppm residual is established
  • Average daily maintenance: 2–3 oz per 10,000 gallons
  • Superchlorination: 1 lb per 10,000 gallons
  • Target free available chlorine: 1–3 ppm

Before You Start

  1. Confirm all pool equipment is working properly.
  2. Backwash the filter system following your equipment manufacturer's directions.
  3. Adjust pH to 7.2–7.6.
  4. Add stabilizer as needed to establish a minimum cyanuric acid level of 30–40 ppm, which reduces the degrading effect of sunlight on the chlorine residual.
  5. Test for metals. If metals are present, add a stain and scale inhibitor before using this product to prevent staining of the pool surface.
  6. When using other products alongside this one, follow the directions on those labels as well.

Initial Treatment and Daily Maintenance

  1. With the pump running, broadcast 4 oz per 10,000 gallons directly into the water in the deep end of the pool.
  2. Repeat additions until a residual of 1–3 ppm free chlorine is established, confirmed with a test kit.
  3. Use a pool brush to disperse any granules that have settled to the bottom. Never allow undissolved product to rest in contact with bleachable pool surfaces.
  4. Test regularly to determine when another dose is needed to hold 1–3 ppm. Average daily requirement runs 2–3 oz per 10,000 gallons, though sunlight, temperature, rainfall, and bather load all shift it.
  5. Add a preventative algae treatment on a weekly basis.

Superchlorination

  1. Broadcast 1 lb per 10,000 gallons directly into the water in the deep end of the pool.
  2. Use a pool brush to disperse any granules that have settled to the bottom.
  3. Never allow undissolved product to rest in contact with bleachable pool surfaces.
  4. Do not re-enter the pool until free chlorine has returned to the normal 1–3 ppm range, confirmed by test kit.

Cold Water and Pre-Dissolving

In water temperatures below 70°F, or any time you prefer a safer application method, pre-dissolve before applying:

  1. Work outdoors, in a clean plastic bucket, stirring with a clean plastic or wooden spoon.
  2. Add the product to the water. Never add water to the product.
  3. Never add more than 1 lb of product to less than 3 gallons of cool water.
  4. Do not mix with any other product when pre-dissolving.
  5. Apply the dissolved solution evenly to the deep end of the pool with the pump running.

Storage and Handling

  • Store in a cool, dry, well-ventilated area away from direct sunlight, heat, and open flame
  • Keep the container tightly closed and the product completely dry — moisture releases chlorine gas
  • Store separately from other pool chemicals, especially calcium hypochlorite shock, acids, and organic materials
  • Keep out of reach of children and pets
  • Never return used or wet product to the original container
  • Avoid breathing dust; broadcast downwind of yourself on a breezy day
  • Read and follow all label precautions, first aid, and disposal directions before use

Pro Tip: Check for metals before the first dose of the season, and don't skip it if you're on well water. Chlorine oxidizes dissolved iron, copper, and manganese out of solution, and once oxidized they deposit onto pool surfaces as brown, green, or black staining that no amount of brushing removes. The pool can look perfectly clear right up until the moment you raise the chlorine level, and then the stain appears seemingly out of nowhere. A stain and scale inhibitor added before you start chlorinating holds those metals in solution and costs a fraction of what stain removal does afterward. This matters most at opening and any time you refill.

Specifications
  • Brand: BioGuard
  • Product Type: Stabilized granular chlorine sanitizer
  • Form: Quick-dissolving granular concentrate
  • Available Sizes: 5 lb and 25 lb
  • Active Ingredient: Sodium dichloro-s-triazinetrione dihydrate, 99%
  • Other Ingredients: 1%
  • Available Chlorine: 56%
  • Stabilized: Yes — contributes cyanuric acid to the water
  • Effect on pH: Does not lower pH
  • Initial Dose: 4 oz per 10,000 gallons, repeated to establish residual
  • Daily Maintenance Dose: 2–3 oz per 10,000 gallons
  • Superchlorination Dose: 1 lb per 10,000 gallons
  • Target Free Chlorine: 1–3 ppm
  • Target pH: 7.2–7.6
  • Minimum Stabilizer Level: 30–40 ppm
  • Application Method: Broadcast into the deep end with the pump running
  • Cold Water Procedure: Pre-dissolve below 70°F — maximum 1 lb per 3 gallons of cool water
  • Pre-Treatment Requirement: Test for metals; add stain and scale inhibitor if present
  • Suitable Surfaces: Vinyl liner, plaster, gunite, fiberglass, painted
  • Best Suited To: Small above-ground pools and in-ground vinyl-lined pools
  • Not For Use In: Biguanide pools, spas, or hot tubs
  • Shipping Classification: DOT-regulated — ground shipping only
Compatibility

Pool Types and Surfaces

  • Small above-ground pools — a primary intended use
  • In-ground vinyl-lined pools — a primary intended use
  • Plaster and gunite
  • Fiberglass
  • Painted surfaces
  • Sand, cartridge, and DE filtration

Water Care Programs

  • Traditional chlorine pools — this is the intended application, either as the primary sanitizer or alongside tablet feeding
  • Salt chlorine generator pools — can supplement generator output during heavy demand or cell downtime, though regular use raises stabilizer levels; check your generator manufacturer's guidance

How It Differs from Other BioGuard Chlorine Products

  • Versus trichlor tablets: tablets feed slowly and continuously through a skimmer, feeder, or floater and are strongly acidic. Super Soluble is applied by hand, dissolves immediately, and is near pH neutral. Tablets are less work day to day; granular gives you far more control and doesn't fight your balance.
  • Versus a weekly multi-purpose shock: a shock product is a weekly oxidizing treatment, often carrying additional components such as clarifiers or algae control. Super Soluble is a sanitizer intended for regular residual maintenance, plus a superchlorination rate when needed. Both are dichlor-based, so both add stabilizer.
  • Versus non-chlorine shock: a non-chlorine oxidizer adds no chlorine and no stabilizer at all. Super Soluble does both. They serve different purposes and are frequently used in the same pool.

Important Incompatibilities

  • Biguanide (non-chlorine) pools — do not use. Chlorine and biguanide chemistry destroy each other, producing cloudy water, filter fouling, and a failed sanitizer residual.
  • Spas and hot tubs — this is a pool product dosed per 10,000 gallons. Use a spa-specific sanitizer scaled for a few hundred gallons.
  • Pools already high in cyanuric acid — every dose adds more. If stabilizer is already elevated, an unstabilized chlorine source is the better choice until levels come down through dilution.
  • Never mix with any other chemical. Do not combine with another product in a bucket, scoop, skimmer, or feeder — calcium hypochlorite shock above all. Mixing chlorine products can cause fire or explosion.

Most products purchased from our online shop within the last 30 days are eligible for return. Please review our return policy to see the list of items that cannot be returned.

Some major items that are non-returnable:

  • Gift cards
  • Electronics
  • Pumps / Motors
  • Hot Tubs
  • Closeouts
  • Fireplaces
  • Electric Fireplaces
  • Massage Chairs
  • See return policy below for full list of non-returnables.

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.