Originally Posted by Regz8000
Well people say that you need a large tank with cold water goldfish but I have a 30 biorb with 4 fish in.a globe eye orange ,a globe eye black(only one eye
) a silver pond fish ( forgot it's name) and a goldfish Wichita sucsessfully I have kept all fish for 2 years now but why do you recommend a large tank.they do perfectly well in a 30 litre ???
I'll bite lol.
What happens to fish in small tanks, with water changes not done as frequently as they should be, is stunting. Stunting is where the fish slows or even stops growing altogether. What happens to these fish is shortened bodies, elongated fins, larger eyes (and possibly organs), curved spines (in extreme cases) and lowered immune systems. This leaves the fish stressed and open to disease.
The small space itself does not stunt the fish, poor water conditions do. You *can* keep goldfish in a small tank as babies but, if cared for correctly, they will soon outgrow the tank. Goldfish do most of their growing in the first three years of life. A common or comet goldfish should be approaching 12 inches by this time. A fancy should be 6-12 inches at three years.
If your goldfish are still small enough to fit into a 30L tank after 2 years they are most definitely stunted. You can still provide them with a proper home. It is not too late. They will never reach their full potential but, once in better conditions, will continue to grow and flourish.