Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to take care of freshwater fish [title] Research different fish species. [step] Look on the internet or at the library for information about your fish options. Take notes about the ones that seem particularly interesting to you.

Ending1: Do you like the bright color of goldfish or perhaps the unique shape of puffers? You can also ask the store clerk for assistance, but it is always best to go in with some prior knowledge. [substeps] Joining a fish forum online is another good option. Ending2: If there are fish that are unique to you, such as a salmon, a trout, or a marlin, look for sensitive species. A big change of environment can change the behavior of freshwater fish. Ending3: If a fish seems appealing, consider spending more time writing about your fish. [title] Consider why you want a freshwater fish to live, whether you're looking for a quality, rich collection or just looking for leftovers. Ending4: Many people struggle to figure out which fish they prefer best, or they're more likely to pick the one that flatters their taste profile. [substeps] To keep your fish happy, keep a record of the experience.

Answer format: ending1/ending2/ending3/ending4