Probiotic hot-tub care
for clearer, gentler water.

Live Bacillus cultures support a balanced water environment — with less chlorine odour and a gentler feel on skin.

WhirlBiotic Flasche, 1 L
Meet us at interbad 2026

Meet us where the future of water takes shape.

From 6 to 8 October, we’re bringing probiotic whirlpool care to Stuttgart. Experience WhirlBiotic in person, talk to our team and discover a gentler alternative to conventional water care.

Visit the interbad website
The problem

Your hot tub should not smell like a swimming pool.

01

Itchy skin after a soak?

Traditional treatments can leave water feeling harsh and disrupt the skin's natural barrier.

02

That chlorine smell?

Strong chemical odor turns a wellness ritual into a maintenance chore — and reminds you of a public pool.

03

Cloudy, slimy water?

Organic residue builds up as organic deposits inside jets, pipes, and along the waterline.

How it works

A living care system for softer spa water.

01

Pour 30 ml

Daily for the first three days, then once per week.

02

Probiotics activate

Beneficial microorganisms break down organic residue and reduce organic deposits.

03

Soak in softer water

Clearer, fresher water with less chemical smell — within 24 hours.

Noticeable within 24 hours. Stable across the week.
Read the full guide & dosing →
Chemical vs. Nature

Two ways to keep water clear.
Only one is alive.

Conventional sanitizers attack everything in the water — including your skin. WhirlBiotic introduces a balanced microbiome that out-competes the bad stuff, gently.

50 millionSPF
The old way

Harsh chemistry

Chlorine · Bromine · Shock

  • Strips skin's protective lipid layer; common cause of dryness and rashes
  • Reactive byproducts irritate eyes and airways at warm temperatures
  • Organic deposits re-form inside pipework within hours of dosing
  • Discharge harms aquatic ecosystems on drainage
  • Constant pH and titration adjustments required
The WhirlBiotic way

Living microbiome

Bacillus ferment · Class 1 safe

  • pH-neutral and dermatologically tested — even for sensitive skin
  • No off-gassing; clean, odorless water you can soak in for hours
  • Continuously breaks down organic deposits at the source — pipes stay clean
  • 100% biodegradable; safe to drain into garden or greywater
  • Self-balancing — just 30ml a week to maintain
WhirlBiotic 1 L Flasche
Ingredients (INCI)
Aqua·Bacillus ferment·Phenoxyethanol·Ethylhexylglycerin
The product

One bottle. One weekly ritual. Softer water.

A biodegradable liquid treatment that uses beneficial microorganisms to break down organic residue, organic deposits, and odors in spa water. A cleaner, more eco-conscious alternative to chlorine, bromine, and harsh treatments.

VeganNo animal-derived inputs
100% biodegradableBreaks down in the water cycle
No microplasticsNo glitter, no polymers
Skin-friendlyDermatologically tested
Safe for jets & pumpsNon-abrasive
Odor-neutralNo fragrance, no masking
Shop the Starter Kit · €79
Bundles

Choose your spa ritual.

1 Litre — WhirlBiotic
Try it

1 Litre

Best for trying probiotic care for the first time.

  • 1 × 1 L bottle
  • 30 ml weekly ritual
  • Digital care guide
€79
€79 / litre · incl. VAT
View product
2 Litres — WhirlBiotic
Popular

2 Litres

Over a year of care in one gentle duo pack.

  • 2 × 1 L bottles
  • 30 ml weekly ritual
  • Free shipping
Save 18%
€129€158
€64.50 / litre · incl. VAT
View product
6-Litre Case — WhirlBiotic
Year supply

6-Litre Case

Multi-year care ritual in one case.

  • 6 × 1 L bottles
  • Free shipping
Save 22%
€369€474
€61.50 / litre · incl. VAT
View product
Frequently asked

Everything you need to know.

Is it safe for children and pets?

Use WhirlBiotic only as directed on the label and keep the concentrate out of reach of children and animals. For children, also follow the spa manufacturer's rules on temperature, supervision, and water hygiene. Ask a doctor or veterinarian about individual health concerns.

Can I still use chlorine or bromine?

Yes. WhirlBiotic is compatible with reduced amounts of chlorine or bromine. Very high spikes can temporarily suppress the cultures — once they subside, the microbiome rebuilds itself. Where chlorine or bromine is legally required, WhirlBiotic does not replace it.

How fast does it work?

Experience suggests that water feel or odour may change within 24 to 48 hours. Establishing a stable care routine can take one to two weeks. Results depend on factors including filtration, use, starting water, and correct dosing.

Will it harm pumps, jets or filters?

The declared formulation contains no abrasive particles, polymers, or glitter. Use it only as directed on the label; for sensitive materials, warranty questions, or a specialist filtration system, check the spa manufacturer's instructions first.

What if I have hard water?

WhirlBiotic works across different water hardness levels. With very hard water we recommend extending the start phase and maintaining balanced water chemistry (pH 7.0 – 7.6).

How often do I use it?

30 ml daily for the first three days, then 30 ml once per week. One bottle covers about 33 weekly applications. If the spa is used several times per day, we recommend dosing an additional cap of WhirlBiotic after each bath.

Where do you ship?

We ship within Germany and to every European Union member state. We do not currently ship to non-EU countries such as Switzerland, the United Kingdom, or Norway.

What is your refund policy?

Consumers have the statutory 14-day right of withdrawal. Original-sealed bottles may be withdrawn during that period and returned with our free DHL label. Opened bottles are excluded from withdrawal for hygiene reasons; statutory warranty rights for defects remain unaffected.

For hotels, spas, wellness operators

Softer water for your guests.

Less chemical odor, a more natural wellness experience, and lower maintenance overhead. Talk to our B2B team about wholesale, spa programs, and white-label options.

Become a partner
Spa Ritual Guide

Get the Probiotic Spa Ritual Guide.

A free PDF guide to softer water, simpler maintenance, and a calmer weekly hot tub routine.

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