Name: 3" Chlorine Tablets
Brand: Standard Chemicals
SKU: 590700
Price: 94.99 USD
Availability: InStock

18 lb bucket · ONE TABLET PER 10,000 GALLONS

3" Chlorine Tablets

Pool-store chemistry without the pool-store markup. Our 3-inch tablets are produced with 99% pure trichloro-s-triazinetrione and deliver 90% available chlorine. We press and individually wrap each tablet to reduce breakage, then pack them in a convenient 18 lb bucket. The stabilized, slow-dissolving formula provides consistent chlorination for 5–7 days while helping protect chlorine from sunlight. Use in floaters, feeders, or automatic chlorinators, delivered straight to your door.

Ships in 1–2 business days

DELIVERED STRAIGHT TO YOUR DOOR

Lower 48

Product Specifications:

Title

Each tablet individually wrapped: minimizes broken tablets

99% Pure Trichloro-s-Triazinetrione (Tri-Chlor): delivers concentrated sanitation

90% Available Chlorine: maximizes disinfecting power

Slow-Dissolving Formula: ensures consistent chlorine release over 5–7 days

UV-Stabilized (Sun-Protected): helps prevent chlorine burnout from sunlight

No Fillers, Binders, or Additives: pure formula, no residue

Convenient Bucket: for storage with easy to carry handle

Easy to Use: ideal for floaters, feeders, or automatic chlorinators

Made in the USA: produced, tested and date-coded in-house

Not sure how many you need? One tablet per 10,000 gallons, per week.

TABLET CALCULATOR

What you're paying for

Chlorine. Not the building it sat in.

A pool store bucket carries a warehouse, a distributor, a storefront, a floor employee and a markup. Strip all of that out and here is what's left: eighteen pounds of trichlor and a wrapper.

What actually changes

Four fewer things to think about

Not features. The specific small annoyances that stop happening once the tablet in your floater is a good one.

no mid-week top-up

It releases over five to seven days instead of dumping everything on day two. You're not out there on Wednesday with a scoop, wondering why the reading dropped again.

no green surprise on friday

UV stabilization keeps chlorine in the water through full sun, so a hot week doesn't quietly undo the tablet you put in on Sunday.

no crumbling, no mess

Every tablet comes wrapped. Nothing powders in the bucket, nothing ends up on your hands, and every tablet in there is a whole one.

no new equipment

Standard 3-inch. It goes in the floater, skimmer or chlorinator you already have, and your routine doesn't change at all.

See how it works

why we can charge less

why we can charge less for the same thing.

We produce it ourselves, pressed on our line, tested in-house several times a day, and shipped to your door. Every step we keep in-house is one less markup.

60M+

Pounds produced a year

20+

Years in pool chemistry

100%

Of the supply chain, in house

One tablet

one minute

once a week

Nothing here costs you a Saturday

One tablet per 10,000 gallons. A 20,000-gallon pool goes through about two a week. That is your entire weekly chemical cost.

Unwrap it and load it into the floater, skimmer basket or chlorinator you already own. Never straight onto the pool floor. It will bleach the surface and cost you a repair.

Run the pump as usual and leave it. Five to seven days of release, no mid-week top-ups, no second trip.

Test on day seven, hold 1–4 ppm free chlorine, load the next one. That's the whole maintenance budget.

Never load trichlor and cal-hypo into the same feeder. That's a fire risk, not a saving.

Work out your weekly cost

The label, in full

You can price-check every line of this

There's no proprietary blend to hide a cheaper formula behind. One active, one purity figure, one available-chlorine number. Take it to any shelf and compare.

Trichloro-s-triazinetrione

Tri-Chlor · TCCA · CAS 87-90-1

99% pure, 90% available chlorine by weight. The industry-standard stabilized tablet active. Nothing exotic, nothing branded, and nothing about it that justifies a premium, which is the point.

What you're not paying for

Fillers

Binders

Clay carriers

Dyes

Proprietary blends

You bought eighteen pounds of chlorine. That's what's in the bucket.

Ours, and the one from the shelf

Same tablet size, same floater, same pool. Here's what changes across a season.

18 LB OF 3" TABLETS		Typical Shelf Brand
Priced direct from our facility, $104.99
Tested daily, 90% available chlorine
Every tablet individually wrapped
99% active, no fillers or binders
Ships direct from the production line

Title

The chemistry the pros use, without the Saturday errand.

Title

Direct-From-Source Pricing

Professional-Grade Strength

Made in the USA

Consistent Chlorine Strength

Produced & Tested In-House

It works when it gets to you, or we send another

Fresh from the line

Chlorine that's been sitting in a warehouse since last spring isn't as strong as the label says, and you'd never know until the pool told you. Ours goes from our line to your door, guaranteed at full labeled strength when it arrives. If the bucket turns up damaged, we replace it free, and you don't have to ship anything back.

Straight from the manufacturer

Guaranteed full labeled strength

Date-coded at production

Specification and handling

The questions a professional asks before switching supplier.

Who actually manufactures these?

We do. The tablets are pressed, tested, wrapped and packed on our own line, backed by more than twenty years in pool and spa chemical manufacturing and over sixty million pounds of annual production. Nothing is bought in and relabeled.

What is the exact composition?

99% trichloro-s-triazinetrione, delivering 90% available chlorine by weight. No fillers, no binders, no clay carriers, no dyes. The full Safety Data Sheet is published on this site in English and Spanish.

How is it tested?

Several times a day, on site, before buckets are sealed. Available chlorine is the figure that matters, and it's the one we verify ourselves rather than accepting an incoming certificate from a third party.

Will it raise cyanuric acid?

Yes. Trichlor is a stabilized chlorine and contributes cyanuric acid as it dissolves. That the mechanism protecting it from UV. Maintain CYA between 30 and 50 ppm. Above roughly 100 ppm chlorine efficacy falls away, and unstabilized calcium hypochlorite becomes the correct product.

Can it be fed or stored alongside cal-hypo?

No. Trichlor and calcium hypochlorite must never share a feeder, a floater or a storage container. Direct contact between the two is a documented fire and reaction hazard. Separate feeders, separate shelves.

How does it ship?

UPS Ground, 2 to 4 business days across the lower 48, dispatched within 1 to 2 business days. Shipping is calculated at checkout by weight and destination. We don't ship to Alaska, Hawaii, territories or P.O. boxes.

pairs well with

Tablets handle continuous sanitation; calcium hypochlorite handles rapid recovery. Both are made in the same building, tested to the same standard, and shipped from the same dock.