Yes. A goldfish can live without a filter. They may not live as long, but they do not have to have a filter, or a heater. I had goldfish in a five gallon tank without a filter for a long time. Hope that this helps.
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.
about half an hour to an hour
No. Unless you put it in a tank with sand.
yes, but it may kill the goldfish
If there is water in there...
Borneo suckers.
godfish can be any color-not just gold. yes u can put them together if they r the same breed (goldfish)
Goldfish just need a plain bowl and some plants
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
I really would not put the tadpoles in with the goldfish...the goldfish will most likely eat them all. It depends on the goldfish size, but eventually they will try to eat the tadpoles whether they suceed or not. :/
Yes