| 8 Products | May 2024 | May 2025 | Change |
| Calgon 4-in-1 Washing Machine Water Softener Limescale Protection Gel (750ml) | £6.90 | £7.00 | + £0.10 1.4% increase |
| | £5.00 | £5.00 | £0.00 No change |
| | £7.00 | £7.00 | £0.00 No change |
| | £7.00 | £7.00 | £0.00 No change |
| | £7.50 | £7.50 | £0.00 No change |
| | £7.35 | £5.00 | - £2.35 -6.9% decrease |
| | £7.00 | £7.00 | £0.00 -5.7% increase |
| | £7.76 | £9.99 | + £2.23 -0.1% increase |
| | £6.49 | £6.49 | £0.00 -0.3% increase |
| | £6.99 | £7.99 | + £1.00 1.4% increase |
| Calgon 4-in-1 Washing Machine Water Softener Tablets Limescale Protection () | £5.78 | £5.67 | - £0.11 -1.9% decrease |
| | £5.00 | £5.98 | + £0.98 19.6% increase |
| | £6.00 | £6.00 | £0.00 8.9% increase |
| | £6.00 | £6.00 | £0.00 5.6% increase |
| | £6.00 | £5.00 | - £1.00 0% decrease |
| | £5.95 | £5.95 | £0.00 No change |
| | £5.00 | £5.00 | £0.00 No change |
| | £6.00 | £6.00 | £0.00 -0.2% increase |
| | £4.99 | £4.99 | £0.00 No change |
| | £7.07 | £6.14 | - £0.93 -1.9% decrease |
| Calgon 4-in-1 Washing Machine Cleaner Tablets () | £13.67 | £12.10 | - £1.57 -11.5% decrease |
| | £16.00 | £11.89 | - £4.11 -25.7% decrease |
| | £12.00 | £12.00 | £0.00 -14.6% increase |
| | £16.00 | £16.00 | £0.00 -9.3% increase |
| | £9.00 | £9.00 | £0.00 -7.8% increase |
| | £10.35 | £10.35 | £0.00 -6.5% increase |
| | £18.50 | £16.00 | - £2.50 -8.1% decrease |
| | £15.99 | £7.53 | - £8.46 -15.5% decrease |
| | £11.49 | £13.99 | + £2.50 -11.5% increase |
| | £6.91 | £6.74 | - £0.17 -2.5% decrease |
| | £4.25 | £4.25 | £0.00 No change |
| | £4.00 | £4.00 | £0.00 No change |
| | £6.00 | £6.00 | £0.00 No change |
| | £9.79 | £8.95 | - £0.84 -3.5% decrease |
| | £10.49 | £10.49 | £0.00 -2.5% increase |
| Calgon Hygiene Plus Washing Machine Water Softener () | £14.56 | £13.00 | - £1.56 -10.7% decrease |
| | £12.00 | £12.00 | £0.00 No change |
| | £15.50 | £15.50 | £0.00 No change |
| | £16.25 | £18.00 | + £1.75 4% increase |
| | £14.50 | £6.49 | - £8.01 -10.7% decrease |
| Calgon 4-in-1 Washing Machine Water Softener Tablets () | £18.94 | £19.31 | + £0.37 2% increase |
| | £23.50 | £25.00 | + £1.50 6.4% increase |
| | £21.33 | £20.93 | - £0.40 2.5% decrease |
| | £11.99 | £11.99 | £0.00 2% increase |
| Calgon Hygiene Tabs Water Softener () | £21.84 | £21.99 | + £0.15 0.7% increase |
| | £24.25 | £23.00 | - £1.25 -5.2% decrease |
| | £22.45 | £19.99 | - £2.46 -7.9% decrease |
| | £18.83 | £22.99 | + £4.16 0.7% increase |
| Calgon 3-in-1 Washing Machine Water Softener Limescale Protection (750ml) | £12.40 | £12.40 | £0.00 No change |
| | £12.40 | £12.40 | £0.00 No change |
