Choose the unit before entering a target
For the selected Cafiza record, the target tool counts individual E31 tablets and knows that a selling jar contains 100. For Dezcal it counts complete 900 gjars, and for Rinza it counts complete 1 Lbottles. These target units are explicit. The site does not combine different chemicals into one stock count or treat an acid-formula bottle as matching alkaline stock.
Work the whole-pack example
A chosen target of 125E31 tablets with 20 usable matching tablets already held creates a gap of 105. Two 100-tabletjars add 200 tablets, giving 220 held and 95 above the chosen target. The surplus is shown rather than hidden. One jar would not meet that selected target;105 jars would confuse tablets with selling jars. This is procurement arithmetic using a user choice, not a maintenance or dose recommendation.
Handle zero and excess stock explicitly
If held matching stock already meets the target, the result is zero new packs. Blank, negative, fractional or excessive counts remain unresolved. The user must decide which actual stock is usable and exactly matching; the tool does not inspect labels, storage condition or lot age. A product-selection change clears the old assumptions so a tablet count is not reused as a bottle count.
Review surplus before buying
A rounded result may lead a buyer to seek a different verified pack or revisit the chosen target. The site does not invent a split jar, discount or smaller pack to remove the surplus. Recheck the actual seller quantity and approved product identity before ordering. Inputs stay in the browser and do not contact an inventory system, retailer or equipment maker.
Whole-unit targets differ by the selected offer
Switching from Cafiza to Rinza changes the target unit from individual tablets to complete bottles. The tool clears the target and held count on that change so a value of 125 tablets is not silently interpreted as 125 bottles. For the selected powder jar, the count is complete 900 gjars rather than scoops or prepared liters. This makes the result explicit and prevents hidden dose assumptions. A buyer wanting a different stock unit should establish its exact supported quantity before using a conversion, rather than interpreting a container target as an application 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 ↗
Urnex: E31 tablet and pack specification ↗
Keep reading
Can a cleaner jar be converted into a monthly maintenance forecast? ↗