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The water chemistry preferred by these fishes, as might be inferred readily from that of the wild habitat, is soft, acidic water (hardness no higher than 6° dH and pH around 6.4–7.0 is preferred). However, for maintenance purposes the pH of the aquarium water can range from 5.6 to 7.4.
Giant Danios are a tropical fish species and require a tanks water temperature to be at least 70 - 80 degrees F. Their lifespan is on average 5-7 years in captivity, and the ideal pH level is anywhere from 6.0 to 8.0.
The toxicity of ammonia is dependent on both pH and temperature and an added complexity is the buffering effect of the blood/water interface across the gill membrane which masks any additional toxicity over about pH 8.0. The management of river chemistry to avoid ecological damage is particularly difficult in the case of ammonia as a wide range ...
Most freshwater aquarium fish do well in water that is soft to moderately hard, and that has a pH between 6 and 8. Brackish water aquaria are a special case and need dedicated community tanks. While a few freshwater and marine fish can adapt to brackish water, most cannot. The most deadly chemical in aquarium water is ammonia, produced from ...
The pond loaches prefer a water pH of 6.5–8.0, but, as a temperate-climate freshwater species, will tolerate far more acidic conditions, even for extended amounts of time, with little negative reactions. This makes the pond loach a great choice for first-time aquariums and for those who want a hardy fish tank able to withstand a few mistakes.
It requires at least a 36inches (91 cm) length aquarium. A normal specimen should be kept in at least a 36-inches (91 cm) or 40gallon (151liter) tank to help them grow and thrive in a regular conditions, as a minimum tank size. The recommended pH is 5.8 to 8.5 with a water hardness of 2 to 30 dH and a temperature of 72 to 86 °F (22–30 °C ...