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)
The COLOMBO pH Test Start is a drop test kit designed for the precise measurement of pH in saltwater aquariums . Easy to use, it allows for the quick verification of a key parameter for maintaining a healthy aquarium balance, thanks to a simple and clear colorimetric reading . The kit includes the test tubes, accessories, and reagents needed to perform the tests without complicated equipment. Its pH measurement range of 7.6 to 8.6 perfectly meets the needs of marine aquarium maintenance, with enough product for up to 40 tests . Practical, reliable, and user-friendly, this test kit easily integrates into a regular maintenance routine to keep a close eye on water quality.
The COLOMBO pH Test Start allows for simple and effective pH monitoring in marine aquariums . This parameter is one that should be monitored regularly, as it provides an immediate indication of the tank's overall balance. Even slight pH deviations can quickly become a warning sign. This drop test kit was specifically designed to offer reliable readings without making monitoring tedious or complicated. With a measuring range of 7.6 to 8.6 , it perfectly covers the relevant values in saltwater aquariums and provides a clear reference point with each check.
This kit is straightforward. Simply take 5 ml of water , add 5 drops of the pH reagent , and shake the test tube. Once mixed, the reading is taken directly using the included color chart . The procedure is short, easy to remember, and perfectly suited to a standard maintenance routine. This is a real advantage for aquarists who want to monitor their water without multiple steps or complicated equipment each time. Everything is designed to make the test practical, quick, and accurate enough for reliable monitoring.
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The result is read by placing the test tube on the provided color chart and then looking directly at it from above . For a more accurate interpretation, it is best to observe the color under indirect light and avoid direct sunlight, which can distort the perception of shades. The hue of the sample is then compared to the colors on the color chart, and the closest match indicates the corresponding value. In practice, the color often falls between two reference points. In this case, an intermediate estimate allows for a more realistic reading. This visual method remains easy to understand while providing a usable measurement for monitoring pH over time.
In a marine aquarium, the ideal pH range is generally between 8.0 and 8.4 . The COLOMBO pH Test Start makes it easy to check if the tank remains within this range. If the pH is too low, adding Colombo Marine KH+ can help raise it. A pH that is too high is less common, but if it occurs, a simple solution is to perform a water change , taking care to check the pH of the new seawater beforehand. This test is therefore not just for reading a value: it also helps you quickly determine if the aquarium remains within a consistent range or if adjustments are necessary.
With enough contents for 40 tests , this COLOMBO kit offers ample capacity for regular monitoring. Test tubes and accessories are included, allowing you to start immediately without needing to purchase additional equipment. This format is ideal for frequent checks on a new tank as well as maintenance checks on an established aquarium. The kit remains compact, convenient to store, and easy to access whenever a test is required. It's exactly the kind of useful product to keep close at hand.
To ensure consistent results, a few simple steps are always helpful. The test tube must be clean before each use and cleaned immediately after the test. The water sample must be taken precisely to ensure the required volume is used. While adding the drops, the bottle must remain perfectly vertical , and air bubbles in the drops should be avoided as much as possible. These details have a real impact on the regularity of the measurements. By following these simple guidelines, the test remains reliable from one use to the next and allows for more confident pH monitoring.
This pH test kit for marine aquariums offers everything you'd expect from a good test kit: easy reading , good accuracy , quick use , and a convenient, long-lasting format. It's ideal for aquarists who want to monitor their water regularly without making tank maintenance a chore. The COLOMBO pH Test Start is a reliable and efficient solution for monitoring a key parameter in marine aquariums with maximum simplicity.
Prime Reef Flakes is a complete flake food rich in vitamins and proteins for marine and freshwater fish.
Easybooster is a liquid mix of four highly concentrated phytoplanktons allowing the feeding of all the animals in your aquarium.
Reagents for seawater calcium (HI 758), 25 tests.


Zoanthus Lab Strontium 250 ml is a concentrated solution designed to precisely correct strontium deficiencies in marine aquariums. Naturally present in seawater, strontium (Sr) contributes to overall ionic balance and supports the growth of calcifying organisms. Formulated with purified water and pharmaceutical- grade strontium chloride hexahydrate , this product guarantees a clear, stable, and perfectly measurable concentration. Free of chelators and unnecessary additives, it is ideally suited for management based on ICP analysis. A transparent and rigorous solution, designed for discerning aquarists.


Zoanthus Lab Nitrate 1000 ml is a concentrated solution designed to precisely increase nitrate ( NO3- ) levels in marine aquariums. Nitrate, an essential nitrogen source for bacterial metabolism and the biological balance of the tank, contributes to the stability of modern reef systems. Formulated with purified water and pharmaceutical-grade calcium dinitrate tetrahydrate , this product guarantees a stable, perfectly measurable, and reproducible concentration. Free of unnecessary additives and stabilizers, it is ideally suited for management based on ICP analysis. A precise and rigorous approach for discerning aquarists.
Powder reagents for Phosphate Checker (HI 713), 25 tests.
Ref: HI713-25
Powder reagents for Nitrite Checker (HI764), 25 tests.
Ref: HI764-25
Food Pipe is a feeding station for aquariums , to feed fish and corals preventing the loss of food in the decantation.
It is equipped with a magnetic holder for easy attachment to the aquarium glass.
This SALIFERT brand analysis kit allows you to accurately measure the calcium level of your seawater. Allows you to take 50 to 100 measurements.
This SALIFERT brand analysis kit allows you to accurately measure the magnesium level of your seawater. Allows you to take around 50 measurements.
This analysis kit from the SALIFERT brand allows you to measure the Kh of your seawater with precision. Allows you to take 100 to 200 measurements.
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 ammonia level of your seawater.
Allows you to take around 50 measurements.
Instructions in French
Accurately tests the nitrate level of your seawater.
Allows you to take around 60 measurements.
Instructions in French
Accurately tests the copper content of your seawater.
Allows you to take around 50 measurements.
Instructions in French
Accurately tests the nitrite level of your seawater.
Allows you to take around 60 measurements.
Instructions in French