50 lb chlorine tablets
19 different 50 lb buckets of 3" tablets from 15 stores, sorted by what you pay per pound of chlorine. For a 15,000-gallon pool losing 3 ppm a day, a 50 lb bucket of plain trichlor lasts about 17 weeks.
Cheapest right now
$1.84/lb
$92.01 · 3 inch 50 Pounds Chlorine Tablets , Stabilized Chlorine Tablets for Hot Tubs, Swimming Pools and Spas - Slow Dissolving · AliExpress (US warehouse)
Typical price
$3.20/lb
Median of 16 in-stock listings
Lowest since Oct 11, 2026
$1.84/lb
AliExpress (US warehouse), Oct 11, 2026
All stores
All brands
$/lb chlorine is the price divided by the pounds of available chlorine in the container, so a 50 lb bucket, a 10% jug and a 12.5% jug all compare fairly.How it's calculated.
Is a 50 lb bucket the right size?
Larger buckets almost always cost less per pound, but trichlor keeps for years if the lid stays on and it's stored dry, so buying ahead is safe. Compare the per-pound price here with the other sizes before deciding, and check how long a bucket lasts your pool with thecost calculator.