Observed arrival · 2026-10-01

A ledger for the exact water-filter cartridge

filterledger.com Visit website

Editorial interest 78/100 Selection signal · not a rating of the site

Filter Ledger presents a small, source-linked dataset for checking replacement-filter fit, manufacturer claims, and estimated refill costs.

Landing page captured for the 2026-10-01 issue.

For: Water-filter owners checking replacement compatibility
Worth noticing: The sample distinguishes a manufacturer-reported lead claim from a record eligible for public recommendation.

Field notes

The pilot pairs system and cartridge identifiers with claim records that include a source URL, verification link, evidence status, and publication-eligibility flag. Its Brita example labels the lead-reduction claim manufacturer-reported, while the cost calculation leaves hardware, tax, and shipping unknown rather than treating them as zero. The page reports $0 revenue and $0 external spend, and says net profit is not established.

Observed signals

Read the marks

Editorial observations of this landing page, not a rating.

○OpenPublic substance visible

✦PrettyNotable craft visible

●ProPolished or operationally mature

◎NicheUnusually specific use

One card from the complete issue

Pink Dolphin Slippers

676,985 arrived 1,000 judged 974 catalogued Enter the complete issue