Creating the perfect water values

The most important information on the water values at a glance

Tropical fish require up to 30 degrees Celsius, while the optimum temperature for cold water fish is below ten degrees in parts. Tip: Measure regularly with an electronic temperature sensor or a thermometer. Increase with a heater. Lower by small ventilators which blow onto the water surface. The winter temperature should generally be a few degrees lower. Always carry out changes carefully.

Temperature

 Nitrogen in various combinations is created by all metabolic processes. How many nitrogen combinations are contained in the water depends on the excretion volume of food and plant residues. In the aquarium, the concentration of toxic substances, like ammonia (NH3) and nitrite (NO2), is much higher than in nature. The filter and aquarium floor contain nitrifying bacteria which remove such harmful nitrogen combinations. However, each water and filter replacement leads to their reduction and the balance has to be regained. Tip: Never replace the water and filters at the same time. Clean filters only with lukewarm water. In addition, balance the feeding levels exactly and remove dead fish and plants immediately.

Acid value (pH)

This is the measure for the concentration of hydrogen ions. If the pH value is below seven, the water is clean. If it is higher, the water is basic or alkaline. Most fish prefer a neutral pH value (7). Tip: Filter the water through peat to lower the water’s acid value. Strong ventilation of the tank increases the acid value as much as careful addition of alkaline.

Water hardness

Value for the volume of minerals (salts) dissolved in the water. Many fish can be cared for in hard water, however, soft water is recommended when breeding as salts attack the spawn. Plants also grow better in soft water as it contains more carbon dioxide for photosynthesis. Tip: Add distilled water to lower the water hardness. Either mix in harder water or carefully add sulphates for higher water hardness.

Metabolic products

Nitrogen in various combinations is created by all metabolic processes. How many nitrogen combinations are contained in the water depends on the excretion volume of food and plant residues. In the aquarium, the concentration of toxic substances like ammonia (NH3) and nitrite (NO2) is much higher than in nature. The filter and aquarium floor contain nitrifying bacteria which remove such harmful nitrogen combinations. However, each water and filter replacement leads to their reduction and the balance has to be regained. Tip: Never replace the water and filters at the same time. Clean filters only with lukewarm water. In addition, balance the feeding levels exactly and remove dead fish and plants immediately.

Nutrients

Tap water without processing agent is dead and is not suitable for aquariums. You find several agents to revive the water in your pet shop. The most important nutrients are, amongst others, potassium, iron, manganese and carbons. All these values should be checked regularly. Key indicators are: temperature: 25o Celsius; pH value: 6 to 7.5; total hardness: 3 to 10do; nitrate: 50 mg/l max.

 

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