Question

1. what is the purpose of the nitrogen cycle in an aquarium? a) to convert nitrate to ammonia b) to increase toxic nutrients from the water c) to maintain a healthy balance of nitrogen compounds d) to increase the waters oxygen levels 6. what is the purpose of a protein skimmer in an aquarium? a) to remove debris and waste from the water b) to convert ammonia to nitrate c) to remove excess organic nutrients and toxins from the water d) to add oxygen to the water 7. what is the primary function of a refractometer (used a dropper) in an aquarium? a) to measure water temperature b) to measure water ph c) to measure water salinity d) to measure water clarity 8. what are the appropriate levels of nitrites in an aquarium a) 0.0 ppm b) 0.5 ppm c) 1.0 ppm d) 2.0 ppm

Explanation:

1. The nitrogen - cycle in an aquarium converts toxic ammonia to less - toxic nitrite and then to nitrate, maintaining a healthy balance of nitrogen compounds.
2. A protein skimmer in an aquarium removes excess organic nutrients and toxins from the water by using the principle of foam fractionation.
3. A refractometer is used to measure the salinity of water by measuring the refractive index of the water sample.
4. Nitrites are toxic to fish in an aquarium, and the appropriate level should be close to 0.0 ppm.

Answer:

1. c) To maintain a healthy balance of nitrogen compounds
2. c) To remove excess organic nutrients and toxins from the water
3. c) To measure water salinity
4. a) 0.0 ppm