How do you clean the gravel at the bottom of the fish tank?

We change 1/3 of the water in our fishes tank every week. How are we supposed to clean out the gravel?
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1 Answer

Answer :

Place the fish carefully in another container with half of the old water and the other half fresh water. Unplug any electrical equipment. Drain the tank. Separate 2 cups of dirty gravel and put aside. Place remaining gravel in a bucket and run forceful water over it, emptying it carefully when water covers the gravel. Do this until the water runs clear. Place the gravel back in the clean tank mixing the 2 cups of reserved gravel with the clean so as not to shock the fish.
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