You will have to strip the tank down to move it. A large waterproof plastic bag is what pet shops provide for fish to be transported in. Another idea is a bucket with a lid. Just remember that they should only be in a small container for as short a time as possible. BTW a 30 ltr tank is not big enough for 2 goldfish to live and grow in. Orandas will grow to around 20cm in a couple of years. The basic rule is 2.5cm of fish needs 4.25lts water. Work it out.
A fish bowl is not a solution its what you keep your goldfish/ beta fish in :P
it depends how big the fish bowl is
If it is as old as a goldfish that can, it can.
The cheapest way to keep a goldfish is to keep it in a fish bowl.........as long as the bowl is big enough the fish will be happy there.
A fish needs 20 litres in a bowl
Yes, provided the bowl is large enough.
Yes, like all pet fish, goldfish need more oxygen than can be provided by just a bowl of water.
The water in a goldfish bowl should be changed at least once a week to maintain the health of the fish.
If one goldfish is always chasing another goldfish, and the goldfish being chased has ripped or torn fins, they are probably fighting. Remove the aggresive fish and put it in another tank or fish bowl. If you are ever in Chelmsford, MA, go to Fins&Feathers Pet Store. They are the best, and they have the healthiest pets. Just tell them Erin sent you.
It should be fine.
Bettas are. Goldfish really should have an aquarium if you want them to live.
Zero, goldfish need very clean cool water and are very dirty fish.