Select your preferred FlowCore colour on the product page, click Add to cart, and proceed to checkout. You can pay with Visa, Mastercard, American Express, PayPal, iDEAL, Apple Pay, Google Pay, Klarna, or Bancontact.

Once payment is confirmed you'll receive an order confirmation email within a few minutes. If you don't see it, check your spam folder.

We dispatch within 2 business days, so changes are only possible if your order hasn't shipped yet. Contact us at info@calqix.com as soon as possible with your order number.

Once dispatched, we're unable to modify the order. You can however return it under our 30-day money-back guarantee once it arrives.

We accept: Visa, Mastercard, American Express, PayPal, iDEAL, Apple Pay, Google Pay, Klarna, and Bancontact.

All transactions are processed securely. CALQIX never stores your card details — payments are handled by Shopify Payments, which is PCI DSS Level 1 certified.

First, check your spam or junk folder — confirmation emails occasionally land there. If it's not there either, your order may not have been processed successfully.

Contact us at info@calqix.com with the email address you used at checkout and we'll look it up immediately.

Yes. calqix.com runs on Shopify, which uses SSL encryption and PCI-compliant payment processing. Your payment data is never stored on our servers.

Yes — new email subscribers receive a 10% welcome discount on their first order. Sign up via the form on the homepage to receive your code instantly.

Occasional promotions are shared exclusively with our email list. We never run persistent sitewide sales — CALQIX is a premium product and we keep pricing honest.

The FlowCore is a cordless oral irrigator — a precision water flosser that delivers 1,600 pulses per minute through a 0.6mm stream. It reaches up to 6mm below the gumline, clearing plaque and bacteria that brushing misses.

It features 3 clinical modes (Clean, Soft, Pulse), is IPX waterproof for use in the shower, and charges via USB-C. Available in Midnight Black, Clinical White, Lime Green, and Blush Pink.

As Step 1 of the CALQIX protocol: FlowCore clears the biofilm barrier first, so nano-hydroxyapatite can bind directly to enamel in Step 2.

The FlowCore is available in four colours: Midnight Black, Clinical White, Lime Green, and Blush Pink. All variants are €39,95 and include the same specifications.

Browse all colours at calqix.com/collections/water-flosser.

Yes. The FlowCore Cordless Oral Irrigator is CE certified, meeting EU compliance standards for electrical devices. It is built to the standard that European dental professionals trust.

CE certification means the device has been independently assessed for safety, electromagnetic compatibility, and performance before entering the EU market.

We recommend using the FlowCore once daily, ideally before brushing and applying nano-HA treatment. Most users see visible results within 14 days of consistent use.

Clinical data from the J. Clinical Periodontology shows an 81% reduction in gum bleeding after 14 days of consistent use. Results vary by individual starting condition.

The LumiCore PAP+ Whitening Kit uses PAP (phthalimido-peroxy-caproic acid) — a peroxide-free whitening agent that breaks down stain molecules without damaging enamel.

It's designed to be used in combination with the FlowCore as part of the full CALQIX protocol: flush → whiten → rebuild. Suitable for sensitive teeth.

Yes. The Soft mode is specifically designed for sensitive gums and those new to water flossing. We recommend starting on Soft mode for the first 1–2 weeks before switching to Clean or Pulse.

If you experience any discomfort or have active gum disease, please consult your dentist before use.

CALQIX Priority Support gives you direct, prioritised access to our customer team — ideal for customers who want personal guidance on the CALQIX protocol, product questions, or any issues resolved as fast as possible.

Questions? Contact us for full details.

Orders are dispatched within 2 business days of payment confirmation. Estimated delivery times from dispatch:

Netherlands / Belgium: 1–3 business days
Germany / France: 3–5 business days
United Kingdom: 5–7 business days
International: 7–14 business days

These are estimates and not guaranteed. During peak periods, minor delays can occur. You'll receive a tracking link once your order ships.

Yes — CALQIX ships worldwide. We currently ship to the Netherlands, Belgium, Germany, France, the United Kingdom, and major international markets.

For deliveries outside the EU, please be aware that import duties and local taxes may apply and are the customer's responsibility. These are not included in our prices.

Free shipping applies to all orders over €80. For orders below this threshold, shipping costs are calculated at checkout based on your delivery address.

Yes. Once your order is dispatched, you'll receive a shipping confirmation email with a tracking link. You can also view your order status anytime at My CALQIX orders.

If your order hasn't arrived within the estimated window, first check your tracking link. If tracking shows delivered but you haven't received it, check with neighbours or your building's postal point.

If the issue persists, contact us with your order number and we'll investigate with the carrier. We always aim to find a solution.

If you're not satisfied with your FlowCore within 30 days of delivery, contact us and we'll refund your purchase. No complicated process — we want you to try it risk-free.

Email info@calqix.com with your order number and we'll handle the rest. Refund is processed within 5 business days of receiving the return.

Step 1: Email info@calqix.com with your order number and reason for return. Do not send anything back without approval first.

Step 2: We'll confirm your return and send you a return address. Note: this is a logistics address only, not a visitor address.

Step 3: Send the item back within 14 days. Return shipping costs are at your expense unless the return is due to a product fault.

Step 4: Refund issued within 5 business days of us receiving the item.

For the FlowCore device: yes, within the 30-day money-back window — reasonable use is expected. The device must be clean and not physically damaged by misuse.

For oral care consumables (tablets, whitening kits): once the factory seal is broken, these cannot be returned for hygiene reasons. This is standard EU law under Article 16(e) of Directive 2011/83/EU.

Refunds are processed within 5 business days of us receiving and inspecting your return. The refund is issued via the same payment method you used at checkout.

Depending on your bank, it may take an additional 3–5 business days to appear in your account.

We're sorry to hear that. Please email info@calqix.com with your order number and clear photos of the damage within 48 hours of delivery.

We'll send you a replacement at no cost. Return shipping is covered by CALQIX in all cases of transit damage or manufacturing defect.

Where offered, the CALQIX subscription delivers your product on a recurring monthly basis at a discounted price. You're billed on the same day each month, and you'll receive a reminder email 3 days before each renewal.

Your first delivery ships immediately upon order confirmation. All subsequent deliveries follow the same schedule.

You can cancel any time via your CALQIX account or by emailing info@calqix.com. There are no cancellation fees and no minimum term.

To avoid being charged for the next cycle, cancel at least 24 hours before your next billing date.

Yes. We send a reminder email 3 days before every renewal charge. This gives you enough time to cancel, skip, or update your payment details if needed.

Yes — contact us at info@calqix.com and we'll adjust your subscription schedule. We're flexible and always happy to help.

Nano-hydroxyapatite (nano-HA) is the primary mineral that makes up 97% of tooth enamel. Its chemical formula is Ca₁₀(PO₄)₆(OH)₂. At the nano-scale (20–80nm), particles are small enough to integrate directly into micro-lesions in enamel, physically rebuilding the surface.

Unlike fluoride, which works by converting enamel into fluorapatite, nano-HA replenishes the actual building blocks of your enamel. It has been used in Japanese dental medicine since the 1980s and is backed by 40+ years of peer-reviewed research.

CALQIX uses it as a fluoride-free, vegan, biocompatible remineralising agent — safe for the whole family.

Nano-HA is recognised as safe by the ISO and the Scientific Committee on Consumer Safety (SCCS). It is biocompatible — identical in composition to the mineral naturally present in your teeth and bones.

All CALQIX formulations are vegan, fluoride-free, SLS-free, and paraben-free. Clean-label by design.

CALQIX products are hand-selected and independently tested for efficacy and safety. The clinical statistics cited — including the 81% reduction in gum bleeding (J. Clinical Periodontology) and 34% less plaque (Int. Journal of Dental Hygiene) — are sourced from peer-reviewed studies on the product category.

All health-related claims are made in the context of general consumer information and do not constitute medical advice. If you have a specific dental health concern, please consult a qualified dental professional.