Stress is significant because it causes illness in fish. It is important to monitor the activity and overall well being of the fish in an aquarium. The signs of stress will be fairly obvious. Slow moving or lethargic looking fish will require a stress coat that can be purchased at a local pet store. Try to avoid overcrowding the tank. There are many varieties of freshwater plants that would work nicely in a fifty five gallon aquarium. Just be sure to purchase an aquatic specific species. If you don't want the hassle of live plants, plastic is always an option. They have come along way with synthetic plants. In most cases the fish may not even notice the difference, unless of course they try to eat them. Wrong! Starting up an aquarium is a process. It takes time and a lot of patience. If you are a beginner, it is recommended that you start out with some hardy freshwater fish, but don't buy the fish just yet. You need to set up the aquarium first. Most aquarium retailers will sell an aquarium in the form of a kit. After removing the algae, finish by wiping down the rest of the tank with a towel or soft rag. You may have to repeat this a few times. Try to rinse the rag or towel frequently to remove all the waste. If you have decorative pieces in the tank, be sure to wash them as well using hot water. After completing these steps, your tank should be clean of waste and build-ups. Dogs and cats require regular visits to the veterinarian, vaccinations, flea and tick medications, etc. Last year the purchase of pet toys was a billion dollar industry. We don't have to worry about buying a tug rope or a stuffed friend for our fish. An aquarium is less of a commitment than larger pets, and can still be a welcome addition to the family home. Catfishes are the ideal candidates for community tanks because they inhabit niches and shelters on the bottom not occupied by other aquarium inhabitants. They generally get along well with all types of fish. Only in combination with some larger Cichlids can there be a problem as the Cichlids tend to extend their territorial claim to the entire tank.