Parasites, bacteria, or fungi commonly cause aquarium fish diseases. However, the presence of these pathogens in your fish’s aquarium does not automatically mean your fish will become ill. Often, the underlying culprit in aquarium fish diseases is poor water quality.  Checking the water quality is the first thing you should if you notice your fish looking unwell.  Testing kits are available that test pH and levels of water hardness, nitrate, nitrate, and ammonia.  Poor water quality can increase the concentration of pathogens in the tank to a level that would make your fish sick. Different species fish can have different water quality requirements. Consult with your veterinarian or the staff at your local pet store for more specific guidance on water quality. When you notice that your fish is unwell, try to recall any changes that you may have made to the aquarium or his normal routine. Sometimes, the changes themselves can cause stress, which can leave your fish more susceptible to illness.  For example, ask yourself if you have added new fish to the aquarium, or changed out any of the water quality equipment.  If you have added a new fish, remember whether you quarantined the new fish before adding it to the tank. A new fish that is sick may expose your other fish to disease. You should also ask yourself if you have recently changed your fish’s diet.  Also, try to remember if you sprayed on perfume or insect repellant near your fish’s aquarium. The chemicals from these substances may have gotten into your fish’s tank and affected the water quality. It is a good idea to treat your fish in a separate aquarium. To reduce your fish’s stress of moving from one tank to the other, keep the water conditions in the quarantine aquarium as close to the conditions in the original tank. Also, place some plastic plants in the new aquarium to help your fish feel more comfortable.  Use a water heater to ensure the water temperature does not fall below 75 degrees Fahrenheit.  Consider using a non-chemical filter, such as a...

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Write a summary of the previous text in Indonesian:
Periksa kualitas air akuarium. Ingat-ingatlah perubahan pada akuarium ikan atau rutinitas yang baru terjadi. Karantinakan ikan. Obati ikan. Kembalikan ikan ke akuariumnya.