First, you need to figure out how far you are moving the tank. The size of the tank also needs to be taken in account for. If you are renovation or need to move the tank from one part of the house to another, the distance is a big factor in moving your tank.

Second, your tank size is a big factor and can be difficult or easy. If your tank is smaller than a ten gallon then the tank can be moved full of water, If you are moving the tank a short distance than the fish can stay in the tank, if the distance is grater that ten feet I would advise to move the tank without the fish. If your tank is ten gallons or bigger then you will not be able to move it safely full of water. I would suggest vacuuming out the water, just like you would do for a cleaning of the tank. First vacuum out all the water except about an inch or two, this way the tank will have some minerals left in it.

Keeping the fish safe should be your first priority. In any instance the fish should be taken out of the tank before it is drained or moved, If you have another aquarium or small tank for carrying fish in, then I would suggest moving the fish into the extra tank, If none of these options are possible than put the fish into bags, like you would at a pet store. Remember the fish cannot stay in the bags or a small-unheated tank very long because of heat and air.

Third, move the tank with the small amount of water, and gravel to the new location. Set up the tank in the now location. Make sure you replace all the water with the correct type. Let the tank re adjust to its normal temperature, the heater s should tank a little while to heat the tank. When the tank is at the right temperature float the fish in the tank for thirty minutes.

When you are ready to re fill the tank, fill it with the right type if water for the fish. Put all the accessories and plants back before the fish, Make sure the heaters have been going for awhile, so that the tank is to the warmth the fish need. If the water is too cold or hot the fish will go into shock. Float the fish in the water, just like when you purchase new fish, to prevent shock. If you follow these steps then your tank will be happy and healthy.

Roshan Goodman gives tips on fish tanks and on aquarium help.