Waiting to buy new fish can be one of the hardest things about fish keeping! You need to add fish gradually. Fish excrete ammonia. If you add too many fish at once to a new fish tank, the water will not be seasoned enough to dissipate it. As the water in your Goldfish tank ages, it builds up beneficial bacteria that turn harmful chemicals excreted by the fish into harmless ones. between 8.2 and 8.4 and a salinity content of 1.020-1.024. As you can see, there is very little wiggle room associated with these measurements. It is extremely important to check the levels daily, or the results could be costly. These invertebrates are not compatible, however, with their food source needs. If you are using an under gravel filter, place it in the bottom of the tank. Next cover the filter with approximately two to three inches of gravel. Fill the tank about a third of the way full with water that has been de-chlorinated. The next step is to add any plants or decorations to the tank. Check with your retailer on the specifics for adding live plants. It's best to understand how to care for your saltwater tank before even buying one so as to avoid possible problems down the road. The first thing you should be aware of is that you will need to buy filtered water or buy a reverse osmosis kit. Otherwise you can use regular water, making sure it is at the correct temperature, and add in chemicals to remove chlorine and other unwanted chemicals. When going out of town, it is acceptable to leave the fish alone for a week or even longer. Just have a neighbor feed them once or twice. There is no grooming or bathing needed for fish. While a home aquarium does require regular maintenance and cleaning, it is minor compared to the care required for larger pets. Any excess food should be lifted with a net if possible, as it will become debris and quickly dirty the tank. Water should be kept regulated and tested weekly. Any discrepancies in P.H. and water temperature should be corrected immediacy in order to minimize stress caused to the fish. Stress is significant because it causes illness in fish.