are these 3" tablets?

The Septicfit tablets are 2.5" or 63.5 mm and are made to fit the 3" tube for aerobic septic systems.

We currently use liquid bleach, how would we replace that with these tablets,?

If you have a sand filter system, there should be a 6” diameter pipe sticking up out of the ground before your pump tank. Inside that 6” pipe there should be a tablet rack which typically will hold around 15 tablets and as the water flows in the horizontal pipe, it erodes the bottom tablet away. 15 tablets last the typical system 3-6 months depending on usage.

Any tips on how to get the bucket open so we can get to the tablets?

The bottom part of the lid has a plastic strip that needs to be removed before you can open container. Take a screw driver or pliers at the front slot break the seal and peel the strip 360 degrees and remove. The lid can now be easily opened and closed.

why not in swimming pools? - can't find unstabilized chlorine tablets - ps doesn't "explode" with di/trichlor in 20kGal H2O

directions say definitely NOT FOR USE IN SWIMMING POOLS

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Chlorine Tablets 132-Tablet Pail (45.1lb) - NOT for USE in Swimming Pools

Chlorine Tablets 132-Tablet Pail (45.1lb) - NOT for USE in Swimming Pools

Product ID: 44023558

Details

Brand
Septicfit
Item Form
Tablets
Item Weight
45 Pounds
Product Benefits
Kills Bacteria
UPC
665659731240

⏳Long-lasting supply, ~1 year usage

📦132 tablets per heavy-duty pail

🧪68% Calcium Hypochlorite purity

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Description

🧼 Keep your aerobic system spotless—because clean water means peace of mind!

GENEROUS 132 TABLET PAIL - Bulk supply designed to keep your system running longer without hassle.
DURABLE NON BREAKABLE TABLETS - Consistent performance with zero wasted product or mess.
STRICTLY NOT FOR SWIMMING POOLS - Avoid costly mistakes—use only where it counts for septic health.
POWERFUL 68 CALCIUM HYPOCHLORITE - Maximize aerobic system efficiency with premium-grade chlorine.
SPECIFICALLY ENGINEERED FOR AEROBIC SYSTEMS - Optimized formula to safely and effectively treat discharge water.

Septicfit Chlorine Tablets come in a 132-count, 45.1 lb pail, formulated with 68% calcium hypochlorite specifically for aerobic treatment systems. These durable tablets provide a long-lasting, reliable solution to disinfect and maintain septic discharge water, ensuring optimal system performance. Not suitable for swimming pools and non-returnable due to hazardous material regulations.

Specifications

ASIN	B0714BR2BR
Best Sellers Rank	#91,763 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #404 in Swimming Pool Chlorine
Brand	Septicfit
Brand Name	Septicfit
Customer Reviews	4.6 out of 5 stars 238 Reviews
Item Form	Tablet
Item Weight	45 Pounds
Manufacturer	Aquafit Chlorination Systems
Manufacturer Part Number	Septicfit 45lb
Model Number	septicfit 45lb
Number of Items	132
Number of Packs	1
Package Size Name	SuperCube
Product Benefits	Kills Bacteria
UPC	665659731240
Unit Count	721.6 Ounce

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£539.64

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In stock

Sold byAmazon UKDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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TrustScore 4.5 | 7,300+ reviews

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