For determining the ammonium and ammonia concentration

Ammonium is the product of nitrogen mineralisation in which bonded nitrogen from food remains and excrement is converted to NH₄⁺ by bacteria. Depending on the pH value, there is an equilibrium between ammonium ions NH₄⁺ and ammonia NH₃ in the water. If the pH value is less than 7, the largely harmless ammonium ions are dominant, while the presence of ammonia grows if the pH value is above 7. Ammonia is very dangerous as it impairs the breathing capability of living beings. It penetrates the cells easily, causing the pH value to rise and inhibiting vital functions. In a healthy and well-established tank, ammonium ions are quickly oxidised by nitrifying bacteria into nitrite and, in turn, into nitrate. If this chain of events is disrupted, the concentration of ammonium can suddenly rise. Therefore, the concentration of ammonium/ammonia should be tested, especially in new tanks.

With the Tropic Marin Ammonium Ammonia-Test the ammonium/ammonia total concentration can be determined with the help of a finely tuned colour chart which includes a concentration range from 0.02 – 3 mg/l. Crucial is the total ammonia concentration which is the result of the ammonia/ammonium total concentration depending on the temperature and the pH-value.

Freshness & Storage

Every batch we dispatch carries a minimum of 6 months’ remaining shelf life. Store this product in a cool, dry place away from direct sunlight, with the cap or inner foil closed tightly after each use.

Returns & Replacement

Returns are accepted within 7 days of delivery, provided the item is unused and in its original packaging. Manufacturer-sealed items cannot be returned once the seal is broken, and sale-priced items are not refundable.

If your item arrives defective or damaged, message us on WhatsApp with your order number — or email us, if you would rather — and we will replace it. Approved replacements are delivered within 3 to 5 business days. Transit damage is covered by insurance on every shipment. If tracking shows delivered but nothing reached you, tell us within 72 hours, which is the reporting window Indian couriers allow. Damage caused during installation or use is not covered; replacement spares for such cases are chargeable.

Full terms are on our Cancellation & Returns page.