Keep the instruction with its product
No. Catsan’s selected page states a minimum 5 cm fill depth. That source condition does not tell this site the usable internal footprint of your tray,how much is removed,how often it is replaced or how much a particular cat uses. It cannot establish a fixed number of days per bag.
Do not treat tray exterior as fill space
External tray length and width are not necessarily the internal area at the intended fill line. Rounded corners,sloping walls and maximum-fill limits can change usable space. No actual tray dimensions or physical volume measurements were taken for this reference.
Separate initial fill from replenishment
Even a measured initial fill would not prove ongoing consumption. Replenishment and complete changes are separate from the first layer,and the relevant product instructions must remain current. We therefore do not turn a 20 L declaration into a monthly budget based on a supposed standard tray.
Use your own stock target
Choose your own matching stock target in litres or whole bags and enter only usable matching stock already held. The tool rounds to purchase packs without predicting days. If an exact fill instruction is needed for another product,read that product’s current label rather than applying Catsan’s 5 cm across the shortlist.
Apply the distinction to a purchase
A chosen stock quantity may be useful even when consumption is unknown. Keep that arithmetic honest by labelling it as a user target and leaving a projected replacement date absent.
Sources & scope
Checked November 5, 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 retailer instructions. Current received labels and independent veterinary/material/content/commerce review remain pending.
Tesco UK Catsan Hygiene20L product260814123 ↗