How do i Move a fish tank from one house to another?
Very carefully! Fish generally don't like to be moved, so be very, very careful!
It is okay to feel sad. Scoop your fish out of the tank and flush the fish down the toilet. You can have a "service" first to say goodbye, or just flush and move on. If your tank holds other fish, it would be wise to clean out the tank. Remember, some fish get sick and die more easily than other fish. You might want to do some research before buying another one.
you can fish the fish out of the tank with a net or a cup and keep them in a bowl with some water that came from the unclean tank, until the next tank is ready for their arrival. So when you have the next tank ready, you can just take the cup and dump them in with the water that you left it in when cleaning.
The tank is not big enough to house any more fish. The basic rule is "1 inch of fish needs a minimum of 1 gallon of water" Although your tank is NOMINALY 1.5 gallons, in fact it will only hold about 1 gallon max because it will never be filled to the brim when it has fish in. (In actual fact the tank is not really big enough to house any fish at all).