Cleaning your aquarium can take all the fun out of fish keeping. With all the beauty and pleasure that you get from a fish tank, there comes the added and undesirable task of cleaning it out. By no means is the task undesirable for the degree of filth, it is more so for the level of effort it requires. However, unless the tank is in terrible shape with the fish preferring to live outside rather than in, aquarium cleaning it is a, pretty much, straightforward job.
There is no hard sequence or rule, the one mentioned below is given to ensure that everything goes systematically with no spills.

Cleaning the gravel requires removal of the water using a siphon. This ensures that all debris is siphoned away along with the water. Vacuum the gravel using the siphon system, re-fill water using the siphon and repeat the process until there is no more debris in the water.