

Aquarium and pond equipment at the best prices!
For those passionate about aquariophily
Having trouble finalizing your order? Contact us 24 hours a day by email at information@zoanthus.fr.
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)
This high-end plastic measuring cylinder is transparent. It has a stable base and a spout. With a height of 36 cm , it is perfect for determining density using the Tropic Marin ® HIGH PRECISION HYDROMETER .
Now it is no longer necessary to stop the pump to take a measurement in the aquarium. Just take the density monitor out of the aquarium. Real child's play!
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The Tropic Marin Hydrometer is a precision instrument for measuring density in aquariums. Tropic Marin ® offers a very high precision instrument. The instrument is made of mouth-blown glass. The measuring range is between 1.021 and 1.031. The maximum variation is only 0.001.
• | Density determination in saltwater aquariums with a hydrometer |
• | Height: 36cm |
• | Capacity: 500ml |
• | Made of transparent plastic (PP – polypropylene) |
• | With stable base and spout |
• | Molded graduations |
NOTE: “Density” is temperature dependent. As the temperature increases, the density decreases. Therefore, the measured water temperature must be 25°C to obtain a correct result.
• | Fill the measuring cylinder with a maximum of 400 ml seawater (water temperature = 25°C). |
• | The hydrometer should be dry and clean. |
• | Carefully place the hydrometer in the water until it floats freely. |
• | Now read the "density" on the blue part of the graduated scale of the hydrometer, at the level of the surface of the water and NOT at the level of the meniscus located higher on the edges! |
• | To avoid deviations in subsequent measurements, rinse the measuring cylinder well with fresh tap water or reverse osmosis water to remove salt residue after each use. |
We recommend different salinities depending on the type of aquarium:
Type of aquarium | Density at 25°C | Salinity in ‰ (psu) |
Fish-only aquariums (not invertebrates) | 1.023 – 1.025 | approx. 31 – 33 |
Coral aquariums | 1.025 – 1.026 | approx. 33 – 35 |
Shrimp | 1.026 – 1.027 | approx. 35 – 36 |
Analysis |
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Sodium carbonate can be used for solution preparation and implementation of the Balling base carbonate method.
All the products in our range are prepared and packed on site in our warehouse.
Products are now packaged in resealable pouches for less breakage during transport. They are also more ecological with 80% less plastic compared to our old packaging.
With the Professional Nitrite/Nitrate Test from Tropic Marin ® the concentration of nitrites and nitrates can be determined with very high accuracy in the low concentration range.
Densimeter by Aqua Medic is a hydrometer intended for the measurement of density [g/ml] - Tp. 25/4°C in seawater aquariums.
JBL DigiScan is a very effective quality thermometer . It simply sticks to the glass of your aquarium. With a display ranging from 0 to 40°C , it has an accuracy of 0.1°C.
Accurately tests the nitrate level of your seawater.
Allows you to take around 60 measurements.
Instructions in French
Standard solution of 35 ppt for the calibration of salinity testers type HI98319 .
Ref: HI70024P
Accurately tests the phosphate level of your seawater.
Allows you to take around 60 measurements.
Instructions in French
Tropic Marin ® NITRIBIOTIC is a solution rich in probiotic and nitrifying bacteria for saltwater and freshwater aquariums
Sodium carbonate can be used for solution preparation and implementation of the Balling base carbonate method.
All the products in our range are prepared and packed on site in our warehouse.
Products are now packaged in resealable pouches for less breakage during transport. They are also more ecological with 80% less plastic compared to our old packaging.
With the Professional Nitrite/Nitrate Test from Tropic Marin ® the concentration of nitrites and nitrates can be determined with very high accuracy in the low concentration range.
Densimeter by Aqua Medic is a hydrometer intended for the measurement of density [g/ml] - Tp. 25/4°C in seawater aquariums.
JBL DigiScan is a very effective quality thermometer . It simply sticks to the glass of your aquarium. With a display ranging from 0 to 40°C , it has an accuracy of 0.1°C.
Accurately tests the nitrate level of your seawater.
Allows you to take around 60 measurements.
Instructions in French
Standard solution of 35 ppt for the calibration of salinity testers type HI98319 .
Ref: HI70024P
Accurately tests the phosphate level of your seawater.
Allows you to take around 60 measurements.
Instructions in French
Tropic Marin ® NITRIBIOTIC is a solution rich in probiotic and nitrifying bacteria for saltwater and freshwater aquariums
Sodium carbonate can be used for solution preparation and implementation of the Balling base carbonate method.
All the products in our range are prepared and packed on site in our warehouse.
Products are now packaged in resealable pouches for less breakage during transport. They are also more ecological with 80% less plastic compared to our old packaging.
With the Professional Nitrite/Nitrate Test from Tropic Marin ® the concentration of nitrites and nitrates can be determined with very high accuracy in the low concentration range.
Densimeter by Aqua Medic is a hydrometer intended for the measurement of density [g/ml] - Tp. 25/4°C in seawater aquariums.
JBL DigiScan is a very effective quality thermometer . It simply sticks to the glass of your aquarium. With a display ranging from 0 to 40°C , it has an accuracy of 0.1°C.
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.
Densimeter by Aqua Medic is a hydrometer intended for the measurement of density [g/ml] - Tp. 25/4°C in seawater aquariums.
The HI98319 Waterproof Salinity Tester is a simple, accurate, and economical way to determine salt concentration in saltwater aquariums.
HI98319 can measure salinity up to 70.00 g/L (ppt).
Results are displayed in g/L (ppt), practical salinity units (PSU) or specific gravity (SG) on a large dual-level LCD screen that also displays temperature. This waterproof tester uses a stainless graphite amperometric conductivity probe to determine the salt content of water.
Hanna Instrument's HI981520 measures and displays real-time pH and salinity of seawater on a large, easy-to-read LCD screen.
The probes are attached with suction cups to the back of an aquarium and are suitable for continuous measurement. They each have 2 m of cable, making it possible to deport the installation of the indicator.
The Aquarium Systems hydrometer allows you to accurately measure the density of seawater at a lower cost.
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.
Densimeter by Aqua Medic is a hydrometer intended for the measurement of density [g/ml] - Tp. 25/4°C in seawater aquariums.
The HI98319 Waterproof Salinity Tester is a simple, accurate, and economical way to determine salt concentration in saltwater aquariums.
HI98319 can measure salinity up to 70.00 g/L (ppt).
Results are displayed in g/L (ppt), practical salinity units (PSU) or specific gravity (SG) on a large dual-level LCD screen that also displays temperature. This waterproof tester uses a stainless graphite amperometric conductivity probe to determine the salt content of water.
Hanna Instrument's HI981520 measures and displays real-time pH and salinity of seawater on a large, easy-to-read LCD screen.
The probes are attached with suction cups to the back of an aquarium and are suitable for continuous measurement. They each have 2 m of cable, making it possible to deport the installation of the indicator.
The Aquarium Systems hydrometer allows you to accurately measure the density of seawater at a lower cost.
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.
Densimeter by Aqua Medic is a hydrometer intended for the measurement of density [g/ml] - Tp. 25/4°C in seawater aquariums.
The HI98319 Waterproof Salinity Tester is a simple, accurate, and economical way to determine salt concentration in saltwater aquariums.
HI98319 can measure salinity up to 70.00 g/L (ppt).
Results are displayed in g/L (ppt), practical salinity units (PSU) or specific gravity (SG) on a large dual-level LCD screen that also displays temperature. This waterproof tester uses a stainless graphite amperometric conductivity probe to determine the salt content of water.
Hanna Instrument's HI981520 measures and displays real-time pH and salinity of seawater on a large, easy-to-read LCD screen.
The probes are attached with suction cups to the back of an aquarium and are suitable for continuous measurement. They each have 2 m of cable, making it possible to deport the installation of the indicator.