Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to troubleshoot tank cycling problems [title] Test your tank water parameters. [step] People without basic test kits often have a poor time cycling tanks, and it is because water parameters are like air and food quality to humans. This includes ph, ammonia, nitrite, and nitrate levels.

Ending1: On a rare occasion, a small amount of nitrites, are released which can result in an extreme cycling problem. Ensure your tank water is balanced before installing the water filtration system, which is usually not required for those systems. Ending2: To check these parameters, set your tank's ph meter to of a zero volt range, allowing it to come to zero if you have a higher ammonia level. This will help ensure that your tank remains stable when cycling. Ending3: Test strips are often vague/unclear, so many people use test kits like the freshwater master test kit (for freshwater) and other kits involving glass tube and water samples. Too high levels of ammonia can be overwhelming for the bacteria to eat. Ending4: This only serves to add unnecessary problems to your tanks. Check the recommended amount of per 1 tub and you will get an accurate number of problems.

Answer format: ending1/ending2/ending3/ending4