Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to ensure your pet fish are healthy [title] Set up and furnish your tank fully, and relax. [step] You don't want to bother your fish by constantly moving around and adding surroundings. For most tanks, a filter, heater, air pump, fake/real plants, substrate, and hiding places are enough.

Ending1: ( semi-aquatic creatures with wet spots tend to be overly calm and gentle in the water. ) [substeps] Plant materials should be readily available in any pet store. Ending2: Each species has its own preferences, though, so research. Saltwater and brackish tanks are also different from freshwater. Ending3: In addition, if your fish is scared of moving, it can become irritated and aggressive. To prevent this, make sure that you can observe your fish for about 20 minutes each day if not more if you have space. Ending4: Keeping these things off the surface of the water will still help strengthen your fish, but it isn't always the best thing to do. [substeps] Try to minimize animal activity, such as cats chasing each other around, when you fish.

Answer format: ending1/ending2/ending3/ending4