They solve different problems. Calgon is a water softener added to every laundry wash — it prevents new scale forming as you wash clothes. viblii Hard Water Formula is a machine descaler run on an empty cycle twice a month — it removes scale that has already built up on the heating element, drum, and pipes. Calgon prevents; viblii removes. Many hard water households use both: Calgon in every wash, viblii for monthly descaling.
Washing Machine Cleaner Tablets — Pet Formula (BACK IN STOCK Jun 10 2026)
Sale price
£14.95
Regular price
£15.95
Unit price
£0.62
per
item
Out of Stock
Washing Machine Cleaner Tablets — Hard Water Formula
Regular price
£14.95
Unit price
£0.62
per
item
Your washing machine has been working harder for months. Every wash in hard water lays down another layer of scale on the heating element — your machine heats slower, uses more energy, fails sooner. The viblii hard water washing machine cleaner clears the backlog. One tablet, twice a month, on a hot cycle. 24 tablets. A year handled for around 62p per clean.
Free tracked delivery — dispatched in 1-2 business days, arrives in 2-5.
Around 62p per clean — 24 tablets, 12 months sorted.
30-day satisfaction guarantee — full refund if you're not happy.
What's in the Formula
Hard water runs through your machine every wash. Calcium and magnesium carbonates settle on the heating element, drum, and internal pipes — building up layer by layer. Your machine heats slower, works harder, and quietly degrades. Detergent residue and organic matter get trapped underneath the mineral film, compounding the problem. Single-ingredient descalers handle the limescale and nothing else — viblii is built as a complete hard water washing machine cleaner.
Citric Acid — the main descaler. Breaks down calcium carbonate on contact, converting limescale into soluble citrate that flushes out through the drain. Works across the heating element, drum, and pipes.
Sodium Silicate — corrosion inhibitor. Forms a protective film on metal surfaces during the acid cycle, so descaling doesn't damage the machine. Industrial descalers include it; most household cleaners don't.
Sodium Polyacrylate — anti-redeposition agent. Keeps dissolved minerals suspended in water so they flush out instead of settling back onto the surfaces you just cleaned.
Sodium Percarbonate — releases active oxygen at 60°C+, lifting detergent residue and organic build-up trapped beneath the mineral layer.
Sodium Carbonate and a non-ionic surfactant — soften the wash water and penetrate mineral films so the active ingredients reach the surfaces they need to.
Four enzymes (alkali protease, protease, lipase, alpha-amylase) — break down protein, fat, and starch residues trapped underneath the scale.
Tea Polyphenols — natural odour neutraliser. Clears the smell caused by organic build-up rather than masking it.
What it tackles:
// Existing limescale on the heating element, drum, and internal pipes
// Mineral film coating rubber seals and gasket folds
// Detergent and fabric softener residue trapped under the scale layer
// Organic build-up that causes musty smells
// Redeposition after descaling — minerals stay suspended, not settled
How to use:
[01] Place one tablet directly in the empty drum — not the detergent drawer
[02] Run the hottest cycle available — 60–90°C, or your machine's drum clean setting
[03] Repeat twice a month. For severe limescale build-up, use 2 tablets for the first 3 cycles.
Shipping & Returns
What's in the Box
Complete the routine.
This is what limescale does to a heating element.
Before (left). After a viblii drum clean (right) — visibly cleaner, shinier drum. Hot wash, empty drum, no detergent.
[The Problem]
What Hard Water Does to Your Machine
[01]
Limescale on the Heating Element
Calcium and magnesium deposits build up layer by layer with every wash. Your machine works harder to heat water — energy bills rise and performance drops before you notice anything visible.
[02]
Mineral Film on Every Surface
Hard water leaves an invisible mineral film on your drum, rubber seals, and internal pipes. Detergent can't clean properly through this layer — it just builds up on top of it.
[03]
Rising Energy Bills, Falling Performance
Scale on the heating element forces it to work harder to reach temperature — energy use rises and performance drops. Scaled elements are the most common failure mode on machines over 3 years old in hard water areas, typically a £150–300 repair. Every wash without descaling makes both numbers worse.
How it works
Five Actives. One Hard Water Washing Machine Cleaner.
Dissolve existing scale. Lift grime trapped underneath. Protect machine internals from corrosion. Prevent redeposition. Break down organic residue. One tablet, every angle covered.
C
Citric Acid
Dissolves existing limescale
10–30% of the formula. Breaks down calcium carbonate on contact — the hard, chalky deposits on your heating element, drum, and pipes. Not a trace amount.
Si
Sodium Silicate
Protects machine internals
Forms a protective film on metal surfaces during descaling, preventing corrosion from the acid cycle. Industrial descalers include it — most household cleaners don't.
P
Sodium Polyacrylate
Stops minerals redepositing
Anti-redeposition agent. Once minerals are dissolved, this keeps them suspended in water so they flush out instead of settling back onto the surfaces you just cleaned.
O
Sodium Percarbonate
Grime and organic build-up
Releases active oxygen at 60°C+, lifting detergent residue, body oils, and organic matter trapped beneath mineral layers.
E
Enzyme Pack
Organic residue under the scale
Four enzymes — alkali protease, protease, lipase, alpha-amylase — break down proteins, fats, and starches that get trapped beneath hard water mineral films.
3 easy steps
Three Steps. Twelve Months.
01
Drop
Place one tablet directly in the empty drum — not the detergent drawer. No prep, no measuring.
02
Run
Run your hottest cycle — 60–90°C, or your machine's drum clean setting. The tablet dissolves completely.
03
Sorted
Repeat twice a month. 24 tablets in the box — every clean tracked inside the lid. One purchase, the full year handled.
[It's Time]
Convinced? Here's the cart.
One tablet, twice a month, hottest cycle. The hard water washing machine cleaner that handles a year of descaling — around 62p per clean, 24 tablets in the box.
Questions.
Is this a Calgon alternative?
How is this different from vinegar or shop-bought descalers?
How do I know if I live in a hard water area?
Will viblii dissolve limescale on the heating element?
Will this remove existing limescale or just prevent new deposits?
Will this work alongside my water softener?
Can limescale actually damage my washing machine?
Is this different from the Pet Formula?
Is this safe for my washing machine?
How many tablets are included?
CHOOSE YOUR FORMULA
Which formula is right for you?
Both descale. The difference is what else they do.
For pet owners — any water area
Pet Formula
- Triple-enzyme formula — breaks down pet hair, oils & organic residue
- Maximum enzyme dose — one tablet handles heavy pet build-up in a single cycle
- Citric acid descaling — clears everyday mineral build-up
- Tea polyphenols — neutralises musty pet odour at the source, no fragrance
£15.95 // 66p per clean
Shop Pet Formula →
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For hard water areas — 200+ ppm
Hard Water Formula
- Citric acid descaling — dissolves existing limescale and mineral deposits
- Scale prevention — sodium silicate and sodium carbonate block new build-up
- Anti-redeposition — loosened minerals flush out, never redeposit
- Enzyme clean included — residue and odour covered
£14.95 // 62p per clean
✓ Selected
In a hard water area with pets? Use both — alternate monthly for a complete clean all year.
[It's Time]
Limescale compounds. This is the fix.
Every wash adds another layer. 62p per clean. One box. Twelve months of descaling handled — with machine protection built in.