It is important to monitor the pH value of your freshwater aquarium. A pH value of 6.5 to 8.0 will suit most species of freshwater aquarium fish. Sudden or significant pH change can occur when tap water is added to your aquarium, therefore it is advisable to check both aquarium and tap water pH before adding water to your aquarium. The Tetratest® pH Kit was professionally developed to accurately determine the pH level in your freshwater aquarium. To ensure optimum water quality, frequent testing is recommended. The kit contains one 10-ml test reagent, a test vial, colour scale, instructions and recommendations and 50 tests.
 

SKU	Description	Price	Order
ZA-RH024	Tetra Test PH Freshwater	£4.17 + Vat

The pH value of water is a measure of the degree of acidity or basicity, with values ranging from 1 (acidic) through 7 (neutral) to 14 (basic). It is important to monitor the pH of your aquarium water because all forms of life, from fish and plants to algae and filter bacteria can show adverse reactions if kept outside their preferred pH range, or if subject to sudden changes in the pH value. In natural marine conditions the buffering action of bicarbonates and carbonates maintains the pH at a very constant value of 8.2-8.4. This value should be replicated in your marine aquarium. The Tetratest® pH kit was professionally developed to accurately determine the pH level in your aquarium water. To ensure optimum water quality, frequent testing is recommended. The kit contains on 10-ml test reagent, test vial, colour scale, instructions and recommendations and 50 tests.
 

SKU	Description	Price	Order
ZA-RH025	Tetra Test PH Marine (Salt Water)	£4.17 + Vat

Nitrite (NO2) results in aquarium water as the natural by-product of decomposition of ammonia due to beneficial biological filtration activity. Nitrite is toxic to fish life, and is further decomposed to nitrate, but interruptions or inefficiencies in filtration can lead to its accumulation. Nitrite concentrations as low as 1.6 mg per litre of water can adversely affect your fish, and in severe cases is fatal. Regular testing for nitrite will ensure optimum water quality and verify filter performance. The Tetratest Nitrite (NO2) kit includes two 10-ml test reagents (#1 & #2), test vial, colour scale, instructions and recommendations and 45 tests

SKU	Description	Price	Order
ZA-RH022	Tetra Test Nitrite	£4.85 + Vat

Nitrate is the end product of biological filtration and the result of decomposition of nitrite. It can also be present in tap water supplies, especially in areas of high fertilizer run-off. Although virtually non-toxic to fish, nitrate is a key algae nutrient and high concentrations can interfere with osmoregulation (the process by which fish exchange salts and other chemicals through the gills with the outside environment). Nitrate can be more toxic and irritating to saltwater invertebrates and should be monitored more closely. Nitrate testing is also an indicator of general water quality and filter function; as biological filtration converts ammonia, to nitrite and finally to nitrate, other import chemical changes take place in the aquarium simultaneously such as loss of alkalinity (buffering capacity) or the accumulation of phosphate - thus nitrate testing can indicate possible imbalances in other areas without directly testing each one. Note: For Freshwater (including outdoor ponds), Brackish and Saltwater.

SKU	Description	Price	Order
ZA-RH028	Tetra Test Nitrate	£6.80 + Vat

The general hardness (GH) of water is a measure of the concentration of divalent cations (2+) present (primarily calcium and magnesium). The general hardness of your water has a direct influence on the regulatory functions of fish (fish skin, gills, and eggs), plants and micro-organisms. A favourable GH value for most ornamental fish between 6° and 16° dH (degrees of German hardness). Often forgotten or lost in significance to testing pH, ammonia, and nitrite, General Hardness is vital to selecting fish suitable to local water supplies or testing the performance of advanced filtration methods including reverse osmosis or deionisation. This kit contains one 10-ml test reagent, a test vial and instructions and recommendations.

SKU	Description	Price	Order
ZA-RH023	Tetra Test General Hardness	£4.25 + Vat