Plastic... It's reliable. Won't let you down.
but, you can get a variety of different ones in pet shops. Also, real plants are good for your tank as they produce oxygen, making it a healthier environment!
real plants are very good for fish tanks. It provides oxygen, a beautiful enviorment, and lowers the risk of algae growth.
Plastic ones are good to. Cheap and last for a long time. I personally would perfer real plants for a tank/bowl that has no filter because you don't have to change the water often. Plastic is good to for any tank/bowl.
It is important to remember to put things in a goldfish tank, even goldfish get bored. Some of my suggestions for tank decor are artificial plants and a "hidey hole" for your goldfish.
Goldfish just need a plain bowl and some plants
Pretty much any thing because they'll eat it
about half an hour to an hour
No. Unless you put it in a tank with sand.
yes, but it may kill the goldfish
Yes, (but you didn't ask if it's a good idea, or if it's bad for the fish)
godfish can be any color-not just gold. yes u can put them together if they r the same breed (goldfish)
If there is water in there...
Borneo suckers.
No. The only thing that can go into a 1g tank is a betta, and that's barely okay. PLEASE don't put any number of goldfish in a 1g
Enough salt and it will kill the fish