they only grow to the size of their tanks, so if you only have a small tank they will stay small. you need water treatments (one to equalise the bad stuff and one to add fish friendly stuff) and they will nip other fish and fan tails get nipped at my normal ones. they think the tails are food :)
fish look after themselves, just change the water
if its a fantail gup. yea tetras and gups go together
Fantail fish usually have four mates.
in december
No, you should only keep goldfish with goldfish (with very few exceptions such as a bristlenose pleco, apple snail or weather loach for example)
round about 10 dollars!
Perhaps you mean 'Clamped fin'. Clamped fin is caused either by parasites or poor water quality. If you mean 'Fantail'. A fantail is a fish with 2 tails instead of one. They are harder to keep than goldfish but are much prettier
either get a normal gold fish or preferably a fantail goldfish
It is in the Spring and goes on to part of the early Summer.
I've had one fantail for the last 4 years. They are a difficult fish to keep as they have ongoing swimbladder problems and pick up internal infections very easily. Do not even contemplate on putting 4 of them in a tank smaller than 150 litres. They need a lot of room and I only have one, and its in a 112 litre tank with 3 other large type coldwater fish. If you have not already bought these fish, I personally would suggest considering different fish. They are hard to keep and are subject to bullying by other fish. Hope I've helped!
Goldfish are peacefull fish and do not normally fight with one another.
Because they like each other:]
as long the babies is bigger than the other same species mouth.