Aquarium and pond equipment at the best prices!
For those passionate about aquariophily
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Basin Analysis
5€ discount for your first order with the code: BIENVENUE05 (from 100€ purchase, offers cannot be combined)
Balling Products
Seawater supplements
Basic elements
Fresh Water Supplements
CO2 system
5€ discount for your first order with the code: BIENVENUE05 (from 100€ purchase, offers cannot be combined)
Water treatment
Bacterial Treatments
Adverse Treatments
Fish Care
Water treatment
Bacterial Treatments
Adverse Treatments
Fish Care
Water treatment
Bacterial Treatments
Fish Care
5€ discount for your first order with the code: BIENVENUE05 (from 100€ purchase, offers cannot be combined)
5€ discount for your first order with the code: BIENVENUE05 (from 100€ purchase, offers cannot be combined)
Sand
Substrate for reactor
Sea Salts
Pond Substrate
5€ discount for your first order with the code: BIENVENUE05 (from 100€ purchase, offers cannot be combined)
Seawater Equipment
Basin Equipment
5€ discount for your first order with the code: BIENVENUE05 (from 100€ purchase, offers cannot be combined)
The JUWEL Digital Thermometer 4.0 is the discreet yet indispensable tool for keeping a precise eye on your aquarium's temperature. Thanks to its large, easy-to-read LCD screen , the temperature can be checked at a glance, without squinting or opening the tank. Its precise sensor, accurate to ±0.5°C , ensures reliable control between 0 and 40°C, ideal for both freshwater and saltwater aquariums. Its modern design integrates seamlessly with JUWEL aquariums and other setups. Easy to install, simple to use, and equipped with a one-click °C/°F unit switch , it offers convenient and continuous monitoring to maintain stable conditions.
Order it before
15:00 tomorrow
and receive it
on
Thursday, March 5, 2026
with
Chronopost - Livraison express à domicile
Maintaining stable water temperatures in an aquarium is essential. Sudden changes can disturb fish, shrimp, or corals. The JUWEL Digital Thermometer 4.0 is designed to provide consistent and reliable water temperature readings . Its integrated sensor accurately measures temperatures from 0 to 40°C , covering most aquarium needs, whether for tropical, community, or reef tanks.
With a tolerance of only ±0.5°C , it allows for the rapid detection of even the slightest variation and the adjustment of heating or cooling accordingly. This precision provides reassurance and prevents unpleasant surprises. A detail that makes all the difference when you want to offer a stable environment to your aquatic inhabitants.
The key feature of the JUWEL Digital Thermometer 4.0 is clearly its large digital display . Transparent and with good contrast, it allows for instant readings, even from a distance. No more searching for a small thermometer stuck in a corner of the tank.
Its sleek, contemporary design blends seamlessly with the aesthetics of JUWEL aquariums. Easily attached using the included suction cups, it takes only seconds to secure and remains perfectly stable. The result is clean, discreet, and harmonious with the rest of the setup.
The thermometer is quick to install and operates on one AAA battery (not included). Its battery compartment has been improved for easier setup. A simple button on the back allows you to switch between Celsius and Fahrenheit as preferred. This is convenient for those who consult different sources or use equipment set to °F.
Suitable for both freshwater and saltwater aquariums , this digital thermometer is essential for any aquarist concerned with precisely monitoring their tank. Reliable, simple, and efficient, it performs its function without any complications.
| Product No. | 85704 |
| Dimensions | 7 x 3 x 8 cm |
| Cable length | 100 cm |
| Mounting hardware included | Suction cup |
| Battery type | 1 x AAA (not included) |
| Suitable for | Fresh water and sea water |
bioPad M is a filter wadding for Compact 3.0 filters. JUWEL filter wadding retains coarse impurities suspended in the water and thus serves as the first mechanical filter.
Juwel BioCarb M is a filter sponge with activated carbon for the Juwel Bioflow 3.0 filter. JUWEL carbon foams absorb odors and turbidity agents as well as toxic compounds and ensure crystal clear water in your aquarium.
Nitrax M is a filter foam for Juwel Bioflow 3.0 filter. It provides a biological filter medium intended to break down the nitrates present in your aquarium. It inhibits the growth of algae and stimulates the vitality of your plants and fish.
bioPlus fine M is a filter foam for the Juwel Bioflow 3.0 filter. The fine JUWEL filter foam is primarily used for the biological filtration of your aquarium and is therefore an essential component of the JUWEL filter system.
bioPlus coarse M is a filter foam for the Juwel Bioflow 3.0 filter. JUWEL large-pore filter foam is used for the mechanical and biological filtration of your aquarium and is therefore an essential component of the JUWEL filter system.
JUWEL Cirax are ceramic-based granules which, due to their extremely large settlement surface , provide an optimal medium for useful filter bacteria . For Juwel Bioflow 3.0 filter .
This SALIFERT brand analysis kit allows you to test the pH of your seawater accurately, on a scale of 7.4 to 8.6. Allows you to take around 50 measurements.
Accurately tests the nitrate level of your seawater.
Allows you to take around 60 measurements.
Instructions in French
Salimeter from Aqua Medic is used for the simple determination of the salt concentration in saltwater aquariums . In saltwater aquariums the specific gravity should be between 1.022 and 1.025.
Immersible digital thermometer by Aqua Medic for mounting on the inside wall of the aquarium . Supplied with suction cup and battery…
T-Meter Twin from Aqua Medic is an external aquarium thermometer .
Heat Controller Duo II, is a measuring and adjustment device used to adjust conventional heating or that under the floor . The accuracy of the measurement is within 0.1 ºC. The value can be adjusted in steps of 1 ºC in the range of 0 – 50 ºC and can be adjusted to the nearest degree.
The T Controller Twin 2.0 is the ideal tool for maintaining the temperature in your aquarium. This digital temperature controller is designed to manage heating and cooling units simultaneously , ensuring a stable and optimal environment for your fish and corals. Thanks to its precision of 0.1°C , it allows fine adjustment of the temperature, covering a range of 16 to 40°C . With high switching power and a seawater-resistant temperature probe, this device is as robust as it is efficient. The clear, easy-to-read LCD screen informs you in real time of the thermal conditions of your aquarium.
Milwaukee TH300 precision thermometer with stainless steel probe and 1 meter cable .
Dimensions: 106 x 58 x 19mm. Comes complete with battery and user manual.
What they think about it
(and they are right...)
Gwendoline m.
Very good and works well (Translated review)
Eva R.
Attractive thermometer perfectly suited to the brand's aquarium. (Translated review)