1. Avoid over-feeding the fish in your aquarium. Know what amount may be enough for your type of aquarium and stick to that. You must be aware that you are trying to recreate an environment for your fish. But it may be far from perfect or ideal since such an environment may not be large enough to take care of the different aspects that make up the natural surroundings of the fish.

Take waste disposal for example, aquariums may not be well-equipped in taking care of the waste brought about by decomposition as well as the development of nitrites unlike in the natural underwater surroundings. But there are ways in order to prevent such wastes from further polluting the aquarium environment and this is by feeding your fish with only the adequate recommended amounts and not more.

2. Make it a point to change at least half of the water inside your aquarium once each month. This will help in diluting and removing the nitrates in the water before it accumulates to dangerous levels. Changing the aquarium water regularly may also help get rid and prevent certain diseases from invading your aquarium fish population.

Changing the water regularly may also help replace some essential trace elements that may have been used up in your aquarium. But bear in mind also that changing more than half of the aquarium water at any one time may not be safe for the fish since it may create an abrupt change in the surroundings that may be stressful for the fish.

3. Have a quarantine aquarium available for sick fish as well as new additions to your aquarium. The quarantine area will help in separating the sick fish from the others and therefore may help curb widespread infection. This also holds true when adding new fish to your main aquarium. The quarantine area may be used to get the new fish acquainted with the new aquarium environment as well as help prevent other outside threats from directly affecting your other fish collection.