Effortless Maintenance
Energy Saving with Individual Controls
3kW Heater for Year-Round Use
Two Filter Box Options — Square or Round
Benefits of shape
At Gardenvity, we offer two Premium Filter Box options — both designed for simple maintenance, long-lasting performance, and effortless cleaning:
Square Filter Box
A classic, angular design that opens both from the top and the side, ensuring easy access to all components.
Round Filter Box
Echoing the traditional curved shape of a hot tub. Opens from the top, with all components easily reachable thanks to its smart and smooth layout.
All-in-One Filtration for Crystal-Clear water
Premium filter components work together as separate elements to ensure effortless water clarity — each part plays its role
Component Overview
1. Sand filter
Efficiently traps debris, maintaining water quality and reducing the need for frequent changes. The filter keeps the water clean for atleast 2 months without changing it and circulates the entire water volume through filtration 4 times per hour.
2. Blue Lagoon UV-C lamp
Disinfects water using ultraviolet light to eliminate bacteria, viruses, and algae.
*Note: Even with a UV-C system, water treatment is still required—just with reduced chemical usage.
Premium features
3. 3 kW Electric Heater, 220 V
Prevents the hot tub from freezing even in lower temperatures, ensuring uninterrupted use during colder seasons.
4. Prefilter
The prefilter catches debris before it reaches the main filter, improving efficiency, reducing maintenance, and minimizing the need to wash the filter balls.
5. Independent controls
Tailored settings for each component, ensuring convenient, customized operation while extending the lifespan of the UV-C lamp.
User-Friendly Design
Benefits of a Premium Sandfilter
Engineered for user convenience, the system allows easy access to key components, simplified cleaning, and intuitive control.
Hassle-free prefilter cleaning
Easy, quick and convenient access to the pre-filter to empty the container of collected debris.
Easy reach dial
Conveniently reach and control the water temperature with no effort.
Convenient access to components
Easily turn components on or off as needed.
Premium components
Prefilter
The prefilter is easy to clean, ensuring minimal effort for maximum performance.
3 kW Heater, 220 V
The heater is easily visible and conveniently placed right inside the filter box.
Independent controls
Each control is numbered for easy identification, with an instruction guide placed on door.
Thoughtful Design – Every Detail Matters
High quality hinges
These hinges are designed for everyday use, providing reliable functionality.
Magnetic Attachments
Magnetic fittings keep the door securely closed, preventing it from opening even in strong winds.
Elevated Legs – Built for Stability and Durability
Elevated legs
Enhance stability and protect both the filter and the surface beneath it. By keeping the unit slightly raised, they help prevent damage to lawns, patios, or decking while ensuring proper airflow around the filter.
Protecting wood
This design reduces moisture and wear exposure, protecting the wood. The filter maintains its durability, ensuring long-lasting performance with minimal upkeep.
Protects
Stabilizes
Safe Filter
Safe and Efficient Hot Tub Control System
Manage your hot tub’s water system with ease
Individual Controls
Operate each component individually for the settings that suit your needs.
Protects Leaks
For added safety, built-in leakage relay protects against electrical leaks by cutting off power if any irregular current is detected, ensuring safe operation and preventing electrical hazards.
Premium Sand Filter Electrical Component Reference
Main devices:
1. Sand filter / pump
2. 3 kW electric water heater (if applicable)
3. Blue Lagoon UV-C (if applicable)
Safety devices:
4. Main filter box switch contactor
5. Earth leakage relay
*Note: The 3 kW heater is connected to the filter pump so that it can only be operated when the filter is running, which ensures optimum efficiency.
Always Know It’s Working with the Operation Indicator Light
Clear Operation Indicator
Stay confident that your filter is doing its job. The operation light shows when the filter is running, so you’ll never leave it on by accident. Save energy and keep control at all times.
Real-time Operation Monitoring:
The indicator light provides a clear, visible signal that shows when the filter is actively running, ensuring you’re always aware of its operation status.
Waterproof Feature:
This allows the filter to be used year – round regardless the season.
Deep-set button:
Prevents accidental pressing and unintended activation ensuring it’s only running when needed.
Dimensions specification
Designed for a Seamless Fit
The box is always matched to your hot tub model — with a curved rear side for round hot tubs and a straight rear side for square models, ensuring a seamless fit.
Dimensions to fit the standarts
• The dimensions of the square filter box: 740 mm x 740 mm x 840 mm.
• The dimensions of the round filter box: 910 mm x 690 mm x 720 mm.
Wood-Fired Hot Tubs with Premium Filtration
Experience crystal-clear water and total peace of mind — thoughtfully equipped for your ultimate relaxation
Premium Sandfilter Wood Fired Hot Tub with Jets | External stove | 24 jets | 4–8 seater
Regular price
8.993 €
Unit price
per
Sale price
8.993 €
Regular price
-0%
VAT and delivery are included in the price.
Square Wood Fired Hot Tub for 4-6 with Premium Filter & Targeted Massage with 24 Hydro Jets | Integrated stove
Regular price
9.208 €
Unit price
per
Sale price
9.208 €
Regular price
-0%
VAT and delivery are included in the price.
Premium Wood-Fired Hot Tub with 28 Hydro-Jets, stove Horizon | For 4-8 Person
Regular price
9.648 €
Unit price
per
Sale price
9.648 €
Regular price
-0%
VAT and delivery are included in the price.
All Inclusive Wood Fired Hot Tub with Jets | Verta™ stove, Premium sand filter system | 24 jets | 4–6 seater
Regular price
8.741 €
Unit price
per
Sale price
8.741 €
Regular price
-0%
VAT and delivery are included in the price.
Connecting filter to the hot tub
Remove attachments
Upon arrival, the hot tub attachments will be fastened to the hoses connected to the filter.
You’ll easily unscrew them.
!* Be careful not to lose small parts.
Attach components
After removing the attachments, carefully screw them onto the tub’s outlets. Make sure the gaskets stay in place to prevent leaks or misalignment. Handle with care to avoid losing any small components.
Connect the filter
Once the attachments are in place, simply screw the hose onto the filter to connect it to the hot tub.
!* Be careful not to lose small parts.
Meticulously Tested for Guaranteed Quality
Thorough Testing for Reliable Performance
Quality Check
Every filter goes through a strict quality check before approval. We test filtration, functionality, and overall performance to ensure it meets the highest standards.
Filtration Testing
During the continuous filtration test, water is circulated to detect any leaks and confirm that each component works as intended. This ensures your filter is reliable from day one.
Gardenvity vs. Most Other Competitors – Key Sand Filter Benefits
Gardenvity
Other
Independent Controls
Attention to Detail
3 kW heater
Blue Lagoon UV-C lamp
Pre-filter
Operation Indicator Light
Easy Connection to Hot Tub
Legs of the filter
Testing
Design Meets Choice – Square or Round Filter Box
At Gardenvity, we strive to lead the market by listening to your needs. That’s why we give you two design options:
Square Filter Box
A timeless classic that perfectly matches square tubs and also pairs beautifully with round ones.
Round Filter Box
Seamlessly follows the soft oval lines of your hot tub, creating a modern look.
Premium Sand Filter - Standalone Product
Upgrade your spa experience with our Premium Sand Filter. It delivers reliable filtration to keep your hot tub water clear, hygienic, and easier to maintain. Ideal as a high-performance upgrade or replacement
Premium Sand Filter for Wood-Fired Hot Tub
Regular price
2.000 €
Unit price
per
Sale price
2.000 €
Regular price
-0%
We’re Here to Help Before and After Your Purchase
Get expert help choosing the right model, features, delivery option, or anything else on your mind.
Expert technical guidance and support
Trusted after-sales care and maintenance tips
Advice on delivery, placement, and installation
Customer Stories
Read customer reviews or browse our gallery of real customer photos to see how Gardenvity hot tubs look in real backyards
Nico Schneidewind
March 5, 2026
“Smooth purchase process, friendly communication. The hot tub arrived well-packaged. The self-assembly went quickly and without any issues. We've been using our hot tub for about 7 weeks now and are thrilled – pure well...”
Read More
Smooth purchase process
“Smooth purchase process, friendly communication. The hot tub arrived well-packaged. The self-assembly went quickly and without any issues. We've been using our hot tub for about 7 weeks now and are thrilled – pure well...”
Read More
Smooth purchase process
Round Wood-Fired Hot Tub Super Offer
Our best-selling wood-fired hot tub, complete with sand filtration, hydro massage, LED lighting, and excellent overall value — available from stock for fast dispatch and the best delivery time
All Inclusive Wood Fired Hot Tub with Air & Hydro Jets | Sand filter & UV-C | 4–6 seater
- 16 hydro jets, 8 air jets, 8 LEDs
- Sand filter with box & UV-C
Regular price
From 5.689 €
Unit price
per
Sale price
From 5.689 €
Regular price
7.341 €
-31%