Swell Sport · Practical guide

Budgeting water use for a home ice bath

Budget ice-bath water in litres first and dollars second. Keep full fills, top-ups and cleaning water separate, then apply the water-use rate on your own bill. This gives you a useful ownership cost without guessing a water-change schedule or confusing the bath’s total capacity with its normal fill.

Swell Arctic U in a poolside setting.

Choose the right volume for the estimate

Swell lists Arctic U with a total bath volume of 400 litres and an approximate recommended fill of 250 litres. Nordic Twin is listed at 800 litres total volume and an approximate recommended fill of 650 litres. Use the stated recommended fill for an initial budgeting scenario, not the larger total-volume figure. Confirm the operating fill for your supplied bath separately. ^[1] ^[2]

Create rows for initial filling, later complete refills, partial top-ups and cleaning water. Put the quantity and evidence beside each row. A seller-listed fill is an estimate input; a measured refill is an observation. Keeping those labels visible prevents a rough first budget from becoming a misleading usage record.

Convert litres before applying a tariff

Water Corporation explains that one kilolitre equals 1,000 litres and that water used between meter readings is calculated by subtracting the earlier reading from the later one. Its WA residential charges use a tiered system, so the applicable rate depends on the account’s circumstances. Use your own provider’s current charges rather than copying a Perth rate into a national budget. ^[3] ^[4]

The calculation is: litres ÷ 1,000 = kilolitres; kilolitres × applicable dollars per kilolitre = water-use charge. Keep fixed account charges and any other applicable charges outside this line unless they genuinely change because of the bath. This is not a complete ownership-cost calculation.

A worked budget, not a refill recommendation

For illustration only, assume four full fills during a chosen budgeting period and a hypothetical flat water-use rate of $3 per kilolitre. At 250 litres per fill, four fills use 1,000 litres, or 1 kL, costing $3. At 650 litres per fill, four fills use 2,600 litres, or 2.6 kL, costing $7.80.

Add a hypothetical 100 litres of top-ups and cleaning water across the same period. That adds 0.1 kL and $0.30. The example totals become 1.1 kL and $3.30 for the smaller fill, or 2.7 kL and $8.10 for the larger fill. None of these assumptions sets a safe refill frequency, predicts your use or represents a quoted local tariff.

Replace estimates with observations

When an approved fill is already taking place, record the accessible meter reading before and after, including the finer units your meter provides. Follow your provider’s meter-reading instructions. Other household water used during that period will also be included, so note washing, irrigation or other simultaneous use rather than attributing everything to the bath. ^[3]

Record top-ups and cleaning separately where practical. Do not infer an exact loss rate from a rough hose-running time. Compare the resulting water total with the original budget and explain any difference before changing the estimate. If your tariff crosses a pricing tier, calculate the relevant portions at their applicable rates.

Use the budget without compromising water care

Choose the water-care routine from the instructions applicable to the bath, then cost that routine. Do not stretch a required cleaning or water-change interval to meet a budget target. If the verified routine is more expensive or demanding than expected, reconsider the purchase or ownership plan instead.

Keep drainage permission, filtration and treatment costs in separate lines or decisions. A modest purchase price for replacement water does not establish an approved disposal route or hygienic water. The useful outcome here is an honest quantity-and-cost allowance that you can update as actual ownership data becomes available.