Separate a direction from authorization
The selected maker pages contain use instructions for their products. Those statements belong to their described applications and versions. A quantity written there does not establish that a different machine manual permits the product in its circuit, reservoir or accessory. Cycle Ledger therefore does not turn a generic label amount into an automatic model-specific approval or a calculator output.
Use the reviewed BES870 distinction
The official booklet separates its cleaning cycle from descaling and names a Breville descaling powder in the latter section. The selected commercial Dezcal 900 gjar is not substituted for that named product by this reference. The Cafiza tablet instruction also remains an unverified exact chemical relationship for the reviewed model. The fact that a number appears in both sources is not enough to equate their products or tasks.
Do not build a workaround from tank capacity
A reservoir's volume is not a chemical approval. The site does not scale a manufacturer ratio to a typed tank size, estimate water hardness or generate a monthly cleaning plan. It also does not recommend a stronger solution or a longer contact time to overcome uncertainty. No mixing of acids, chlorine or different cleaning products is suggested. The tools stay with product references, declared package quantities and monetary arithmetic.
Ask the actual source question
When a label and machine requirement conflict, identify the exact products and versions and obtain clarification from the relevant makers. Keep the combination unknown until that question is resolved. A valid unit-price comparison can help plan a purchase, but it cannot supply missing authorization. The site has not tested material compatibility, residues or a successful cleaning cycle to settle the disagreement experimentally.
A known ratio is still conditional on the application
A chemical maker may publish an amount for a named application. That does not mean an arbitrary reader's machine shares that application, circuit, material or procedure. The site therefore does not ask for reservoir liters and multiply the number into an instruction. Its budget can divide purchase price by a declared container quantity without making a use solution. The distinction is practical: procurement arithmetic remains reviewable, while a model-specific operational decision stays attached to the actual label and equipment source rather than becoming a generic calculator recommendation.
Sources & scope
Checked November 4, 2026. Manufacturer and retailer references support the specific statements. Dated displayed prices are not final checkout quotes, performance rankings or performance testing. This shopping reference does not replace the exact product label or qualified individual advice. Current received labels, exact chemical/model authorization and independent chemical/equipment/content/commerce review remain pending.
Urnex US: Cafiza E31 12-E31-UX100 ↗
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