Try to feed only an amount that can be consumed in the first thirty to sixty seconds. When setting up an invertebrate tank remember to include live rock, because some invertebrates feed on the parasites that grow on the live rock. A substrate should also be included in this type of aquarium. It will provide a place for the crabs and shrimp to dig and bury themselves. 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. You can buy a timer from the pet store to make sure the light is on at the exact time each day. Otherwise the lighting could range from day to day and algae will form. Try to position the saltwater aquarium away from direct sunlight as this will also add to the growth of algae. The key to maintaining a healthy saltwater aquarium is to keep it clean and algae free. Start with hardy fish, such as live bearers, gouramis, barbs, and danios. These fish are hardy enough to handle higher nitrate levels in the tank. Allow about thirty days for these fish to become acclimated to the tank, before adding any new fish. It usually takes about thirty days for the symptoms of ich or other fish illnesses to show up. The following steps are easy and quick and will provide your fish with a clean and happy aquarium. Step 1 (prepare for cleaning) You have to prepare for the steps to follow before removing your fish from your freshwater aquarium. There are some supplies you will need to clean the tank, so it's best to have them handy before starting. Most common are goldfish and guppies, but there are a multitude available and you will be able to have an array of fish living in your coldwater tank. The supplies you will need to set up your aquarium may seem lengthy, but it is actually a much shorter and cheaper list than that of a heated freshwater tank or a saltwater tank.